{"title":"Shelyak","description":"\u003cdiv\u003e\n  \u003cp\u003e\n    Spectroscopy is the branch of amateur astronomy where a modest telescope still contributes real science. A spectrum reveals what a star is made of, how fast it is moving, and whether something has changed — measurements that are as valuable from a backyard as from a mountaintop. Shelyak Instruments builds the spectrographs that make this accessible. David Astro carries Shelyak products in Canada, in stock, with fast shipping across Canada and worldwide.\n  \u003c\/p\u003e\n  \u003cp\u003e\n    Resolution, target brightness and telescope aperture determine which instrument suits you. Tell us what you want to measure and we will match it.\n  \u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!-- more --\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eAmateur Spectroscopy Instruments\u003c\/h2\u003e\n  \u003cp\u003e\n    Spectrographs trade resolution against the faintness of the targets they can reach. Choosing well means knowing which side of that trade your programme sits on.\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLow-resolution spectrographs:\u003c\/strong\u003e Capture a broad spectrum from relatively faint targets, suitable for classifying stars, observing novae and studying emission-line objects.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eHigh-resolution spectrographs:\u003c\/strong\u003e Resolve fine line detail and small wavelength shifts for radial velocity and line profile work, requiring brighter targets and longer exposures.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEchelle designs:\u003c\/strong\u003e Capture a wide wavelength range at high resolution simultaneously by stacking spectral orders, at higher cost and complexity.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCalibration modules:\u003c\/strong\u003e Reference lamps that provide known wavelength lines, without which a spectrum cannot be accurately calibrated.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eGuiding provision:\u003c\/strong\u003e Keeping a star on a narrow slit for minutes requires integrated guiding, and this is a core part of the instrument rather than an add-on.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTransmission gratings:\u003c\/strong\u003e Simple grating filters that thread into an eyepiece barrel, the least expensive way to record a first spectrum.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eWhy Choose David Astro for Shelyak\u003c\/h2\u003e\n  \u003cp\u003e\n    Spectroscopy has a steeper learning curve than imaging, and the equipment choice should reflect where you are starting.\n  \u003c\/p\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eProgramme-based recommendation:\u003c\/strong\u003e We ask what you want to measure, because a radial velocity programme and a nova monitoring programme need very different resolutions.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRealistic aperture guidance:\u003c\/strong\u003e Spectroscopy spreads a star's light across a detector, so target brightness and aperture matter more than in imaging. We set expectations honestly.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eStarting point suggested:\u003c\/strong\u003e For a first spectrum we will often suggest a transmission grating before a slit spectrograph, since it teaches the workflow at a fraction of the cost.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAuthorized dealer:\u003c\/strong\u003e Full manufacturer warranty with support handled in Canada.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShips from Canada:\u003c\/strong\u003e No duties or brokerage fees for Canadian buyers.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eShelyak in Canada — Frequently Asked Questions\u003c\/h2\u003e\n  \u003cdl\u003e\n    \u003cdt\u003e\u003cstrong\u003eWhat aperture do I need for spectroscopy?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eMore than for imaging the same object, because the light is spread across a spectrum. Low-resolution work on bright stars is achievable with modest apertures; high resolution needs both aperture and bright targets.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eCan amateurs contribute real data?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eYes, substantially. Amateur spectra of novae, symbiotic stars and Be stars feed into professional monitoring programmes, because professionals cannot cover every object every night.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eWhere should I start?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eA transmission grating that threads into an eyepiece barrel records a recognizable spectrum for very little money and teaches the calibration workflow, which is the hard part.\u003c\/dd\u003e\n    \u003cdt\u003e\u003cstrong\u003eDo I need a calibration lamp?\u003c\/strong\u003e\u003c\/dt\u003e\n    \u003cdd\u003eFor quantitative work, yes. Without reference lines of known wavelength you cannot calibrate the spectrum accurately, which limits it to qualitative comparison.\u003c\/dd\u003e\n  \u003c\/dl\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n  \u003ch2\u003eInterested in spectroscopy?\u003c\/h2\u003e\n  \u003cp\u003eTell us your telescope and what you want to measure and we will suggest a starting instrument. In stock and shipping from Canada.\u003c\/p\u003e\n\u003c\/div\u003e","products":[{"product_id":"shelyak-alpy-600-spectroscope","title":"Shelyak Alpy 600 Spectroscope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eResolution Power of R~600 with the 25µm slit\u003c\/li\u003e\n\u003cli\u003eSpectral Resolution of approximately 1nm\u003c\/li\u003e\n\u003cli\u003eFast F\/4 optical design for high light throughput\u003c\/li\u003e\n\u003cli\u003eMulti-position slit wheel with 25µm, 50µm, 100µm, and 300µm options\u003c\/li\u003e\n\u003cli\u003eCovers a wide 370-750 nm wavelength range\u003c\/li\u003e\n\u003cli\u003eCompact 65mm body weighing only 200g\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Alpy 600 Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Alpy 600 Spectroscope is a complete scientific instrument that packs a resolving power of R~600 into a compact body just 65mm long and weighing only 200g. Its fast F\/4 optical design and multi-position slit wheel, featuring a 25µm slit for ~1nm spectral resolution, provide a versatile platform for astrophysical discovery. With a flexible mechanical backfocus range of 10.5mm to 21mm, the Alpy 600 integrates easily into existing imaging trains to measure the temperature of a star, define its spectral class, or track the expansion of a nova.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAn R~600 Spectroscope for Discovery and Science\u003c\/h3\u003e\n\u003cp\u003eThe Alpy 600 is an entry into slit-based \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e. It enables you to move beyond simple imaging and begin analyzing the physical properties of celestial objects. This instrument is for the dedicated amateur astronomer ready to produce high-quality scientific data on stars, nebulae, galaxies, comets, and planets.\u003c\/p\u003e\n\u003cp\u003eUnlike simpler slitless gratings that blend the light of your target with the background sky, the Alpy 600's slit isolates a specific object. This fundamental design choice produces clean, high-contrast spectra, making your data robust and independent of seeing conditions or minor tracking errors. It is the key to accurate wavelength calibration and the study of extended objects, turning your observations into verifiable measurements suitable for pro-am collaboration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 600 lines\/mm Grism Optical System\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the Alpy 600 is a dispersing element called a grism. This component is a hybrid of a prism and a \u003ca href=\"\/en-int\/collections\/gratings-and-slits\"\u003ediffraction grating\u003c\/a\u003e, combining the light-dispersing power of a 600 lines\/mm grating with the on-axis transmission of a prism. This clever design spreads the incoming light into a detailed spectrum while keeping the optical path straight, resulting in a compact and rigid instrument.\u003c\/p\u003e\n\u003cp\u003eThe on-axis design eliminates the significant beam deviation that occurs with a standalone grating. The result is an on-axis instrument. The Alpy 600 is robust, insensitive to temperature variations and requires few adjustments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eR~600 Performance Across the 370-750 nm Spectrum\u003c\/h3\u003e\n\u003cp\u003eThe Alpy 600 delivers a resolving power (R) of approximately 600 when using the 25µm slit. This level of resolution allows you to distinguish spectral features separated by about 1nm, which is sufficient to identify key absorption and emission lines across the visible spectrum. The instrument's effective wavelength range spans from 370 nm in the near-ultraviolet to 750 nm in the near-infrared.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdentify Spectral Classes:\u003c\/strong\u003e The R~600 resolution lets you classify stars based on their spectral features, from hot O- and B-type stars with strong helium lines to cool M-type stars with prominent molecular bands.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eObserve Emission Lines:\u003c\/strong\u003e You can clearly resolve the H-alpha emission in Be stars, track the evolution of novae, and identify the characteristic lines of planetary nebulae.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFollow Variable Stars:\u003c\/strong\u003e You can watch variable stars evolve from day to day and compare different spectral types.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Multi-Position Slit Wheel from 25µm to 3mm\u003c\/h3\u003e\n\u003cp\u003eThe slit is a critical component that defines the resolution and contrast of your spectrum. The Alpy 600 includes a multi-position wheel with a variety of apertures to match different targets and observing conditions, with a slit length of 3mm (except the 25µm hole).\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e25µm, 50µm, 100µm, 300µm Slits:\u003c\/strong\u003e This range allows you to make the critical trade-off between resolution and light throughput. The 25µm slit is the standard slit and gives the R~600 resolution. Use the 300µm slit when you have no guiding module but want to remove most of the sky background, or to collect all the light of a star whose image is larger than 25µm.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25µm Hole:\u003c\/strong\u003e The spectrum always falls at the same position in the image, which reproduces on the bench what you will see with stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3mm Hole:\u003c\/strong\u003e This large aperture effectively puts the spectroscope into a \"slitless\" mode. This is for point-like stars: you see a larger star field and can easily find the star you are looking for. Keeping the 3mm hole in place, rather than removing the slit, limits optical aberrations at the field edges.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptimized for F\/4 and Apertures from 80mm\u003c\/h3\u003e\n\u003cp\u003eThe Alpy 600 features a fast F\/4 optical design, ensuring maximum light throughput and high efficiency. While it performs optimally at F\/5, it is designed to work well with telescopes from F\/4 to F\/10. This versatility means it can be paired with a wide range of instruments, from fast \u003ca href=\"\/en-int\/collections\/refractors\"\u003erefractors\u003c\/a\u003e and \u003ca href=\"\/en-int\/collections\/newtonian-telescopes\"\u003eNewtonians\u003c\/a\u003e to \u003ca href=\"\/en-int\/collections\/schmidt-cassegrain-telescopes\"\u003eSchmidt-Cassegrains\u003c\/a\u003e, with or without a \u003ca href=\"\/en-int\/collections\/flatteners-and-reducers\"\u003efocal reducer\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eIts lightweight 200g body and compact 65mm x 45mm dimensions make it suitable for use on telescopes with apertures as small as 80mm, mounted on modest equatorial mounts. This accessibility allows you to begin capturing spectra of bright to moderately faint objects without needing a massive observatory-class setup. The spectroscope performs best with telescopes up to 400mm in aperture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMechanical Interfaces: 10.5-21mm Backfocus and Standard M42 Threads\u003c\/h3\u003e\n\u003cp\u003eIntegrating the Alpy 600 into your imaging train is straightforward thanks to its use of standard mechanical interfaces. The camera-side connection is a standard T-mount thread (M42x0.75mm).\u003c\/p\u003e\n\u003cp\u003eThe camera's mechanical backfocus can be anywhere in a 10.5mm to 21mm range. On the telescope side, the Alpy 600 comes equipped with a 1.25\" nosepiece, which screws into the M42x0.75 thread of the external body; the same thread is used on both ends of that body. This allows you to easily swap the 1.25\" nosepiece for a standard 2\" adapter if needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCamera Requirements: Sensor Size and Backfocus Considerations\u003c\/h3\u003e\n\u003cp\u003eTo capture the full 370-750 nm spectral range of the Alpy 600, your camera's sensor should have a minimum length of 8.5mm along the dispersion axis. Any camera with a sensor longer than 14mm and a mechanical backfocus between 10 and 20mm will do.\u003c\/p\u003e\n\u003cp\u003eA DSLR can be used, but its standard backfocus of ~55mm is well beyond the Alpy 600's native 10.5-21mm range. To accommodate this, the optional Alpy DSLR \u003ca href=\"\/en-int\/collections\/barlows-and-extenders\"\u003eBarlow\u003c\/a\u003e Adapter is required to extend the spectroscope's focal point to reach the DSLR sensor. The \u003ca href=\"\/en-int\/products\/zwo-asi533mm-pro-mono\"\u003eZWO ASI533MM Pro\u003c\/a\u003e camera is recommended for spectra acquisition with the Alpy 600.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eModularity: The Optional Guiding and Calibration System\u003c\/h3\u003e\n\u003cp\u003eThe Alpy 600 is a complete spectroscope on its own, and it can be extended with two optional modules.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuiding Module:\u003c\/strong\u003e This essential upgrade provides a view of the field around the slit. It allows you to see your target star and accurately place it onto the narrow slit, then use an \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eautoguiding camera\u003c\/a\u003e to keep it there for long exposures. This is the key to comfort, efficiency, and data quality.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration Module:\u003c\/strong\u003e For data to be scientifically valuable, it must be calibrated. This module provides a built-in Argon-Neon lamp for precise wavelength calibration and a halogen lamp for flat-fielding. It removes guesswork and ensures your measurements are accurate and repeatable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eWith the calibration module and the guiding module fitted, the total backfocus is 64mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFrom Acquisition to Analysis with Demetra Software\u003c\/h3\u003e\n\u003cp\u003eShelyak provides the Demetra software, available as a free download, to manage the entire spectroscopy workflow. Designed specifically for the Alpy 600, Demetra guides you from initial setup and image acquisition to fully processed and calibrated scientific data.\u003c\/p\u003e\n\u003cp\u003eDemetra integrates camera control (via ASCOM), session management, and a guided data reduction pipeline. It prompts you for necessary calibration frames (such as darks, flats and reference lamp spectra) and uses a color-coded system to show the completeness of your data set. The processing is fully automated yet transparent, allowing you to follow each step from raw image to final, scientifically-valid spectral profile. This all-in-one solution streamlines the complex process of spectroscopy, letting you focus on your targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePro-Am Projects with the Alpy 600\u003c\/h3\u003e\n\u003cp\u003eThe data quality produced by the Alpy 600 is sufficient for contributing to a wide range of scientific and pro-am collaboration projects. Its R~600 resolution enables meaningful analysis that goes far beyond pretty pictures.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission-Line Stars:\u003c\/strong\u003e Observe absorption and emission lines and follow how they change over time in active stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNovae:\u003c\/strong\u003e The Alpy 600's uses include measuring the expansion velocity of a nova.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable Star Spectroscopy:\u003c\/strong\u003e Observe the spectral changes in variable stars as they cycle through their periods of brightness, revealing the physical processes driving their variability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComet and Planet Analysis:\u003c\/strong\u003e Comets and planets are among its targets; with the slit you can work on extended objects such as planets.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Compact 200g Instrument and First Light\u003c\/h3\u003e\n\u003cp\u003eThe Alpy 600 is engineered to be compact, robust, and easy to use. The main body is just 65mm long with a 45mm diameter, and the entire unit weighs a mere 200g. This compactness makes it compatible with small telescopes from 80mm diameter on modest mounts.\u003c\/p\u003e\n\u003cp\u003eGetting started is a straightforward process. The recommended learning path is to begin with daylight observations of the solar spectrum or household lamps to familiarize yourself with focusing, slit selection, and the data reduction process in Demetra. From there, you can move to the telescope for visual observations of bright stars in slitless mode (using the 3mm hole), before progressing to capturing your first scientific, slit-based stellar spectra.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of scientific projects can I do with the Shelyak Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Alpy 600's R~600 resolution opens the door to many pro-am projects. You can classify stars by their spectral type (O, B, A, F, G, K, M), measure the expansion velocity of a nova, or monitor the changing spectra of variable stars and comets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose the right slit size (25µm, 50µm, 100µm, 300µm) for my target with the Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe choice is a trade-off between resolution and light throughput. For the highest detail on bright stars to resolve fine spectral features, use the narrowest slits (\u003cstrong\u003e25µm\u003c\/strong\u003e or \u003cstrong\u003e50µm\u003c\/strong\u003e). For faint, extended objects like nebulae or galaxies where collecting photons is the priority, use the wider slits (\u003cstrong\u003e100µm\u003c\/strong\u003e or \u003cstrong\u003e300µm\u003c\/strong\u003e) at the cost of lower resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use my DSLR camera with the Shelyak Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but with an adapter. A DSLR with a standard T-ring has a backfocus of about 55mm, which is too long for the Alpy 600's native 10.5-21mm range. You will need the optional \u003cstrong\u003eAlpy DSLR camera barlow adapter\u003c\/strong\u003e to achieve focus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of the Alpy 600's R~600 resolution for observing Be stars like Gamma Cassiopeiae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn R~600 resolution suits Be stars like Gamma Cassiopeiae (Navi). It allows you to clearly resolve the prominent Hydrogen-alpha emission line at 656.3 nm that characterizes these stars. This feature appears as a sharp spike \"filling in\" the normal absorption line. With the Alpy 600, you can monitor the strength and shape of this emission line over time to track activity in the star's circumstellar disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Alpy 600 perform on a bright planet like Jupiter with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe slit lets the Alpy 600 work on extended objects such as planets, for example with an 8\" f\/10 SCT. You can orient the slit across Jupiter's disk to see the absorption bands of methane and ammonia in its atmosphere. By comparing the spectra of the dark belts and bright zones, you can look for differences between them.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need the optional guiding and calibration modules for the Shelyak Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile not required to start, the optional modules significantly improve the scientific workflow. \u003cstrong\u003eThe guiding module\u003c\/strong\u003e lets you see the field of view to accurately place and keep your target on the narrow slit, which is very difficult otherwise. \u003cstrong\u003eThe calibration module\u003c\/strong\u003e provides a reference lamp (Argon-Neon), which is essential for precise wavelength calibration, turning your data from a picture into a scientific measurement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between the Alpy 600's slit mode and a simple slitless grating?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA slitless grating is simpler but merges your target's spectrum with the sky background and any nearby stars. The Alpy 600's \u003cstrong\u003eslit\u003c\/strong\u003e physically blocks out this unwanted light, producing a clean, high-contrast spectrum. This isolation is essential for accurate calibration, observing faint or extended objects, and producing reliable data regardless of seeing or tracking quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is a \"grism\" and why does the Alpy 600 use one?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA grism is a combination of a diffraction \u003cstrong\u003egri\u003c\/strong\u003eting and a pri\u003cstrong\u003esm\u003c\/strong\u003e. The grating spreads the light into a spectrum, while the prism corrects the angle of the light path. This allows the Alpy 600 to have a straight-through, \"on-axis\" optical design, making the instrument much more compact, rigid, and easier to mount than \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrographs\u003c\/a\u003e with more complex folded light paths.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat camera sensor size is best for the Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo capture the full 370-750 nm wavelength range, a sensor with a length of at least 8.5mm is required. A sensor \u003cstrong\u003elonger than 14mm\u003c\/strong\u003e will do. The camera's mechanical backfocus must be within the 10.5mm to 21mm range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat software is needed to process data from the Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eShelyak provides its own free software, \u003cstrong\u003eDemetra\u003c\/strong\u003e, which is designed to handle the entire workflow from image acquisition to fully calibrated spectra. It is an all-in-one solution for controlling your camera (via ASCOM), managing observing sessions, and performing the necessary data reduction steps. Other tools like ISIS and AudeLA can also be used.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the Alpy 600 focused and aligned?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThere are two focus adjustments. First, the spectroscope itself is focused to the camera by threading the main body in or out of the camera adapter to make the spectral lines sharp. Second, you focus the telescope to make the spectrum as thin (vertically) as possible. Alignment is done by rotating the Alpy 600 core inside its body to make the spectrum horizontal in your camera frame.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Alpy 600 sensitive to temperature changes during the night?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the Alpy 600 is designed to be robust and insensitive to typical ambient temperature variations during an observing session. It requires few adjustments.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution Power\u003c\/td\u003e\n\u003ctd\u003eR ~600 (with 25µm slit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Resolution\u003c\/td\u003e\n\u003ctd\u003e~1nm (with 25µm slit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003eF\/4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit Options\u003c\/td\u003e\n\u003ctd\u003eMulti-position wheel with 25µm, 50µm, 100µm, 300µm slits (5µm tolerance); 25µm hole; 3mm hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit Length\u003c\/td\u003e\n\u003ctd\u003e3mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e200g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e65mm length, 45mm diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera Interface\u003c\/td\u003e\n\u003ctd\u003eT-mount thread (M42x0.75mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Backfocus\u003c\/td\u003e\n\u003ctd\u003e10.5mm to 21mm range\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTotal Backfocus (with modules)\u003c\/td\u003e\n\u003ctd\u003e64mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength range\u003c\/td\u003e\n\u003ctd\u003e370-750 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003e1.25\" nosepiece (M42x0.75 thread on external body)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDispersing element\u003c\/td\u003e\n\u003ctd\u003eGrism (prism and 600 lines\/mm grating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope aperture\u003c\/td\u003e\n\u003ctd\u003efrom 80 mm; best used with telescopes up to 400 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAlpy 600 spectroscope, assembled in slit configuration\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMulti-position slit (25, 50, 100, 300 µm slits; 25 µm and 3 mm holes)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e1.25-inch nosepiece\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTool set\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Alpy_600_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Alpy 600 Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Alpy_Backfocus_Diagram.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Alpy Backfocus Diagram\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Demetra_Software_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Demetra Software Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44968070545693,"sku":"SHK-PF0035","price":1389.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/Shelyal-Alpy600-LowRes__29165.1671740990.1280.1280.jpg?v=1684348645"},{"product_id":"shelyak-alpy-guiding-module","title":"Shelyak Alpy Guiding Module","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEssential guiding accessory for Alpy 600 \u0026amp; UVEX spectroscopes\u003c\/li\u003e\n\u003cli\u003eEnsures precise centering of the target star on the spectroscope slit\u003c\/li\u003e\n\u003cli\u003eUtilizes a reflective slit for off-axis guiding with a separate camera\u003c\/li\u003e\n\u003cli\u003eAdds 34mm of mechanical backfocus to the optical train\u003c\/li\u003e\n\u003cli\u003eLightweight 260g design minimizes impact on mount balance\u003c\/li\u003e\n\u003cli\u003eCompact 90x65x75mm body for easy integration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Alpy Guiding Module\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Alpy Guiding Module solves the primary challenge of astronomical \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e by adding only 260g and a compact 90x65x75mm profile to your imaging train. This essential accessory for the \u003ca href=\"\/en-int\/products\/shelyak-alpy-600-spectroscope\"\u003eAlpy 600\u003c\/a\u003e and UVEX provides a critical 34mm of mechanical backfocus, using an innovative reflective slit to ensure your target star remains perfectly centered for accurate data acquisition.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eReflective Slit Guiding: Centering Your Star with the Alpy 600 \u0026amp; UVEX\u003c\/h3\u003e\n\u003cp\u003eWhen observing a star's spectrum, the target must be placed precisely on the \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e's slit and held there. The Alpy Guiding Module makes this possible by replacing the standard slit with a reflective, slightly inclined one. This surface reflects the entire telescope field of view to a separate \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguiding camera\u003c\/a\u003e, allowing you to see both your target star and the slit simultaneously.\u003c\/p\u003e\n\u003cp\u003eThis system transforms pointing and guiding from a difficult guessing game into a straightforward, repeatable process. You can visually confirm the star is centered before an exposure and use autoguiding software to keep it locked in place for the duration of the observation. For any spectroscopic work lasting more than a few seconds, this module is an indispensable tool.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptical \u0026amp; Mechanical Integration: 34mm Backfocus in a 260g Package\u003c\/h3\u003e\n\u003cp\u003eDesigned for seamless integration, the Alpy Guiding Module is both compact and lightweight. At just 260g, it adds minimal load to your mount, preserving tracking accuracy and balance. Its 90x65x75mm dimensions ensure it fits easily into complex imaging trains without causing clearance issues.\u003c\/p\u003e\n\u003cp\u003eThe module introduces a fixed 34mm of mechanical backfocus, measured from the module's body to the reflective slit. This is a critical measurement for planning your optical train and ensuring you can achieve focus with both your guiding camera and the main spectroscope camera. This fixed, known distance simplifies the setup process for reliable, repeatable scientific measurements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the Alpy Guiding Module essential for the Alpy 600 or UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWithout it, you have no way to visually confirm that your target star is on the spectroscope's slit. The \u003cstrong\u003eAlpy Guiding Module\u003c\/strong\u003e reflects the field of view to a guide camera, allowing you to see the star and the slit together. This is critical for both initial pointing and for autoguiding during long exposures to prevent the star from drifting off the slit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Alpy Guiding Module's reflective slit work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe module contains a specially designed slit that is mirrored and slightly tilted. The starlight that falls on the slit passes through to the spectroscope, while the mirrored surface reflects the surrounding field of view to a guiding mirror that sends it, at a right angle to the telescope axis, to a separate port. You connect a guiding camera to this port to see the field and guide the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the exact backfocus of the Alpy Guiding Module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe mechanical backfocus on the telescope side is \u003cstrong\u003e34mm\u003c\/strong\u003e. This is the precise distance from the main body of the guiding module to the surface of the reflective slit. You must account for this distance when calculating the spacing for your complete imaging train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Alpy Guiding Module visually with an eyepiece?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile primarily designed for a guiding camera, visual use is possible with an optional \u003ca href=\"\/en-int\/collections\/visual-adapters\"\u003eeyepiece holder\u003c\/a\u003e (sold separately). This allows you to look through an \u003ca href=\"\/en-int\/collections\/eyepieces\"\u003eeyepiece\u003c\/a\u003e to center the star on the slit manually. However, for any long-exposure work, a guiding camera is highly recommended for autoguiding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Alpy Guiding Module help when taking a spectrum of Vega (Alpha Lyrae) with an 8\" SCT and a UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn 8\" SCT has a long focal length, creating a very narrow field of view. Finding and centering a bright star like Vega on the invisible slit would be very difficult. With the \u003cstrong\u003eAlpy Guiding Module\u003c\/strong\u003e, you can use your guide camera to easily locate Vega in the field, place it perfectly on the slit, and then engage your mount's autoguiding to keep it there, ensuring all of the star's light enters the UVEX for a high-quality spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 260g weight of the Alpy Guiding Module affect my portable mount's balance?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAt only \u003cstrong\u003e260g\u003c\/strong\u003e (about half a pound), the module's weight is minimal. While you should always rebalance your telescope after adding any accessory, this small mass is unlikely to cause significant balance or tracking issues on most mounts capable of supporting a spectroscope and camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanical Backfocus\u003c\/td\u003e\n\u003ctd\u003e34mm (from module body to slit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e260g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e90 x 65 x 75mm (without guiding camera)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 (T-mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-side connection\u003c\/td\u003e\n\u003ctd\u003eC-mount (guiding camera)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits spectrograph\u003c\/td\u003e\n\u003ctd\u003eShelyak Alpy 600, Shelyak UVEX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAlpy guiding module\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMirror slit (23 µm)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Alpy_Guiding_Module_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Alpy Guiding Module Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Alpy_Autoguiding_Camera_Assembly_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Alpy Autoguiding Camera Assembly Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44968070611229,"sku":"SHK-PF0036","price":1604.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/PF0036-Alpy-guiding-module-T210x187_134__36715.1671741744.1280.1280.png?v=1684348649"},{"product_id":"shelyak-alpy-calibration-module","title":"Shelyak Alpy Calibration Module","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eArgon-Neon (Ar-Ne) calibration lamp for precise wavelength reference\u003c\/li\u003e\n\u003cli\u003eTungsten-halogen lamp for creating flat-field frames\u003c\/li\u003e\n\u003cli\u003eIntegrated dark frame mode with a servo-controlled shutter\u003c\/li\u003e\n\u003cli\u003eCompact dimensions of 100x95x30mm\u003c\/li\u003e\n\u003cli\u003eLightweight design at only 300g\u003c\/li\u003e\n\u003cli\u003eRemote control capability via 12V inputs\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Alpy Calibration Module\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Alpy Calibration Module automates essential reference frames for the \u003ca href=\"\/en-int\/products\/shelyak-alpy-600-spectroscope\"\u003eAlpy 600\u003c\/a\u003e and UVEX \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrographs\u003c\/a\u003e, integrating Argon-Neon and halogen lamps into a compact 100x95x30mm unit. Weighing just 300g, this module allows you to acquire wavelength calibration, flat-field, and dark frames remotely without altering your telescope setup, dramatically increasing observational productivity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDual Lamps for Full Calibration: Argon-Neon (Ar-Ne) and Halogen\u003c\/h3\u003e\n\u003cp\u003eAccurate \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e requires two fundamental reference frames. The Alpy Calibration Module includes an Argon-Neon (Ar-Ne) lamp which produces a spectrum with numerous, well-defined emission lines at known wavelengths. This allows you to precisely calibrate the wavelength scale of your scientific spectra. For correcting pixel-to-pixel sensitivity variations and removing dust motes, the module incorporates a halogen lamp that provides a smooth, continuous spectrum for creating high-quality flat-field images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e3-in-1 Automated Workflow: Servo Control for Calibration, Flats, and Darks\u003c\/h3\u003e\n\u003cp\u003eThis module streamlines your entire calibration sequence. A servo-motor controls a small screen that moves into the telescope's light path on command. Activating one of the lamps illuminates the spectrograph's slit under conditions that mimic the telescope's beam. For dark frames, you can simply leave the lamps off and move the screen into place, blocking the telescope's beam without needing to cap it manually at night. In full daylight, a separate shutter is still required. This three-mode system—calibration, flat, and dark—makes acquiring a complete set of reference images a simple, repeatable process.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRemote Operation: Dual 12V Inputs for Unattended Spectrography\u003c\/h3\u003e\n\u003cp\u003eDesigned for modern, automated observatories, the Alpy Calibration Module can be fully controlled without physical intervention. In addition to manual switches, two separate connectors accept a 12V signal to activate the Ar-Ne and halogen lamps independently. This allows you to integrate the calibration process directly into your imaging software's automation scripts, enabling a complete, unattended observing session from start to finish. The module requires a 12V DC \u003ca href=\"\/en-int\/collections\/power-accessories\"\u003epower supply\u003c\/a\u003e capable of at least 1A.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the two different lamps in the Shelyak Alpy Calibration Module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe module contains two lamps for two distinct calibration tasks. The \u003cstrong\u003eArgon-Neon (Ar-Ne) lamp\u003c\/strong\u003e produces sharp emission lines at known wavelengths, which are used to accurately calibrate the wavelength scale of your spectrum. The \u003cstrong\u003ehalogen lamp\u003c\/strong\u003e produces a continuous, uniform light source used to create flat-field frames, which correct for pixel sensitivity variations and dust on the sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Alpy Calibration Module create dark frames without a separate shutter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe module uses its internal servo-controlled screen. When you activate both switches, the screen moves into the telescope's light path with both lamps off, which prevents the starlight from entering the spectroscope. This allows you to take dark or offset frames at night without manually capping the telescope. In full daylight, a separate shutter is still required.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I control the Shelyak Alpy Calibration Module from my computer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The module is designed for remote operation. It features two 12V trigger inputs that allow you to switch each lamp on and off using a relay box or similar device controlled by your PC. This enables you to integrate the calibration process into automated imaging sequences in software like PRISM or MaxIm DL.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm measuring the radial velocity of the star Arcturus (Alpha Boötis) with my UVEX spectrograph. How does this module improve my accuracy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor precise radial velocity measurements, a stable and immediate wavelength calibration is critical. The Alpy Calibration Module allows you to take an Argon-Neon calibration spectrum immediately before or after your spectrum of Arcturus without touching the instrument. This minimizes errors from instrument flexure or temperature changes, ensuring your wavelength solution is as accurate as possible for measuring the Doppler shift in the star's spectral lines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy observatory is remote. How does the Alpy Calibration Module fit into an automated imaging sequence with an Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe module is ideal for remote observatories. Using its 12V inputs, you can script the entire calibration process. A typical automated sequence would be:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd of Night:\u003c\/strong\u003e Telescope slews to a park position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDark Frames:\u003c\/strong\u003e Script powers both 12V inputs at once, which moves the module's screen into place with both lamps off, to take darks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat Frames:\u003c\/strong\u003e Script activates the halogen lamp for a series of flat-field exposures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration Frames:\u003c\/strong\u003e Script activates the Argon-Neon lamp for wavelength calibration exposures.\u003c\/li\u003e\n\u003c\/ul\u003e\nThis allows for fully unattended, repeatable data acquisition and calibration.\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat power supply do I need for the Shelyak Alpy Calibration Module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will need an external power supply that can provide at least \u003cstrong\u003e12V DC at 1A\u003c\/strong\u003e. The power connector type is a standard center-positive barrel plug. This is a common power supply type for many astronomy accessories.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e300g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e100 x 95 x 30 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration Lamp\u003c\/td\u003e\n\u003ctd\u003eArgon-Neon (Ar-Ne)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlat-Field Lamp\u003c\/td\u003e\n\u003ctd\u003eHalogen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDark Frame Function\u003c\/td\u003e\n\u003ctd\u003eYes (via internal servo-controlled mask)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote Control\u003c\/td\u003e\n\u003ctd\u003e2x 12V inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e12V DC, 1A (minimum)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak Alpy 600, Shelyak UVEX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 (T-mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-side connection\u003c\/td\u003e\n\u003ctd\u003e4 x M4 screws to Alpy guiding module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAlpy calibration module\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFour M4x20mm screws\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAllen wrench\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Alpy_Calibration_Module_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Alpy Calibration Module Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44968070643997,"sku":"SHK-PF0037","price":1317.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/PF0037-Alpy-guiding-module-T198x210_135_w__55288.1671741838.1280.1280.png?v=1684348651"},{"product_id":"shelyak-star-analyser-100","title":"Shelyak Star Analyser 100","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eTurns any astronomy camera or DSLR into a spectroscope\u003c\/li\u003e\n\u003cli\u003eInstalls as easily as a standard 1.25\" filter\u003c\/li\u003e\n\u003cli\u003eHigh-efficiency transmission grating blazed for the first order\u003c\/li\u003e\n\u003cli\u003eCaptures low-resolution spectra of every star in the field of view\u003c\/li\u003e\n\u003cli\u003eIdeal for an educational and low-cost entry into astronomical spectroscopy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Star Analyser 100\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Star Analyser 100 transforms your existing imaging setup into a capable \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e by threading directly into any standard 1.25″ \u003ca href=\"\/en-int\/collections\/filter-wheels\"\u003efilter wheel\u003c\/a\u003e or nosepiece. This simple accessory requires no complex alignment, allowing you to capture low-resolution stellar spectra using the same 1.25″ workflow you already use for imaging.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntroduction to Spectroscopy: From Imaging to Spectral Analysis\u003c\/h3\u003e\n\u003cp\u003eThe Star Analyser 100 is designed to be the most accessible entry point into the world of astronomical \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e. It operates just like a standard filter; simply place it in the optical path in front of your camera, and every star in the field will be accompanied by its spectrum. This allows you to immediately see and record the fundamental differences between stellar types without changing your established imaging process.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptical Design for Bright, Low-Resolution Spectra\u003c\/h3\u003e\n\u003cp\u003eThis accessory uses a high-efficiency \u003ca href=\"\/en-int\/collections\/gratings-and-slits\"\u003etransmission grating\u003c\/a\u003e that is blazed for the first order, maximizing the amount of light directed into the spectrum. This results in brighter, more easily recorded spectra, which is critical for capturing data on fainter stars or with shorter exposures. The trade-off is resolution; this device is built for identifying broad spectral features and stellar classifications, not for detecting subtle radial velocity shifts.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eUniversal Compatibility: The 1.25\" Filter-Thread Standard\u003c\/h3\u003e\n\u003cp\u003eEngineered for maximum compatibility, the Star Analyser 100 is mounted in a standard 1.25″ filter cell. This allows it to be screwed into the nosepiece of a DSLR or dedicated \u003ca href=\"\/en-int\/collections\/cameras\"\u003eastronomy camera\u003c\/a\u003e, or placed in a 1.25\" filter wheel for easy switching between standard imaging and spectroscopy. If the grating-to-sensor distance of your setup is below the recommended minimum, the manual recommends adding spacers (each adds an adjustable 7-10 mm).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the Shelyak Star Analyser 100 with my DSLR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eUsing the Shelyak Star Analyser 100 with a DSLR is straightforward. You simply thread it onto the 1.25\" \u003ca href=\"\/en-int\/collections\/imaging-adapters\"\u003eT-adapter\u003c\/a\u003e nosepiece that connects your camera to the telescope's focuser. Once installed, every star in your camera's field of view will produce a visible spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of astronomical objects can I analyze with the Shelyak Star Analyser 100?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Star Analyser 100 is ideal for observing bright, point-source objects. Its primary use is for capturing the spectra of stars to determine their spectral type (e.g., O, B, A, F, G, K, M). It can also be used to study the spectra of bright comets, novae, and quasars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Shelyak Star Analyser 100 work with my existing 1.25\" filters?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the Star Analyser 100 fits in a standard 1.25\" \u003ca href=\"\/en-int\/collections\/filter-accessories\"\u003efilter holder\u003c\/a\u003e, it is a spectroscope, not a filter. It is designed to be used on its own to split starlight into a spectrum. Using it in combination with a narrowband or color filter would block most of the spectral data you are trying to capture.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Shelyak Star Analyser 100 to see the difference between a hot blue star like Vega (Alpha Lyrae) and a cool red star like Betelgeuse (Alpha Orionis)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. This is the perfect application for the Star Analyser 100. The spectrum of Vega will appear brightest in the blue-violet region, while the spectrum of Betelgeuse will be much brighter in the red and orange regions and show prominent absorption bands from molecules in its cool atmosphere. These differences will be immediately obvious in your images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I set up the Shelyak Star Analyser 100 on my 8\" Schmidt-Cassegrain telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor an 8\" SCT, you would attach your camera via a standard T-adapter and 1.25\" nosepiece. The Shelyak Star Analyser 100 simply threads into the front of the nosepiece before you insert it into the telescope's visual back or \u003ca href=\"\/en-int\/collections\/diagonals\"\u003ediagonal\u003c\/a\u003e. Check the grating-to-sensor distance first: if it is below the recommended minimum, add spacers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does 'low-resolution' mean for spectra captured with the Shelyak Star Analyser 100?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eLow-resolution spectroscopy means you can see the broad features of a star's spectrum, like its overall color continuum and the strongest absorption lines (like the Balmer series in A-type stars). It is not designed to resolve very fine, narrow spectral lines or measure tiny doppler shifts used to find exoplanets. It excels at stellar classification and education.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving power (R)\u003c\/td\u003e\n\u003ctd\u003eR ~100 (resolution typically 1\/100 of the wavelength, about 5 nm at 500 nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003ethread: M28.5x0.6 (1.25in filter); gender: female\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-side connection\u003c\/td\u003e\n\u003ctd\u003ethread: M28.5x0.6 (1.25in filter); gender: male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e11.2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eStar Analyser 100\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Star_Analyser_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Star Analyser Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44968070807837,"sku":"SHK-PF0003","price":265.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/PF0003-Star-Analyser_5__12858.1671742177.1280.1280.png?v=1684348653"},{"product_id":"shelyak-star-analyser-200","title":"Shelyak Star Analyser 200","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eInstantly converts your imaging camera into a spectroscope\u003c\/li\u003e\n\u003cli\u003eOptimized for use in filter wheels close to the sensor\u003c\/li\u003e\n\u003cli\u003eProduces a low-resolution spectrum for every star in the field\u003c\/li\u003e\n\u003cli\u003eThe ideal, low-cost entry into astronomical spectroscopy\u003c\/li\u003e\n\u003cli\u003eWorks with your existing DSLR or dedicated astronomy camera\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eShelyak Star Analyser 200\u003c\/h2\u003e\n      \u003cp\u003eThe Shelyak Star Analyser 200 is the most direct path to exploring the science of starlight, converting your standard astrophotography setup into a capable \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e. This simple accessory threads into your \u003ca href=\"\/en-int\/collections\/filter-wheels\"\u003efilter wheel\u003c\/a\u003e like any other filter, instantly generating a low-resolution spectrum for every star in your camera's field of view. It is engineered specifically for optical trains where the grating must be placed very close to the camera sensor, making it the definitive choice for integrated filter wheel systems.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eLow-Resolution Spectroscopy: Your First Step into Stellar Science\u003c\/h3\u003e\n      \u003cp\u003eThe Star Analyser 200 makes your first steps into \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e as simple as taking a picture. By placing the grating in the light path, you can capture and compare the spectral signatures of different stars, revealing their chemical composition, temperature, and radial velocity. There's no complex alignment; you work under the same conditions as you would for standard imaging.\u003c\/p\u003e\n      \u003cp\u003eThis approach allows you to see the clear differences between a hot, blue star like Vega and a cool, red star like Betelgeuse. The trade-off is resolution; this is a survey instrument designed for accessibility, not for high-resolution scientific research. It excels at revealing the fundamental characteristics of stars without a steep learning curve.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n    \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eStar Analyser 200 vs. 100: Choosing for Your Imaging Train\u003c\/h3\u003e\n      \u003cp\u003eShelyak offers two primary gratings, the SA100 and the SA200, and the right choice depends entirely on your hardware. The Star Analyser 200 is specifically designed for setups where the distance between the grating and the camera sensor is short.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\nStar Analyser 200 (This Model): Its higher dispersion gives the same spectrum length at half the distance from the sensor, which suits the close spacing inside a filter wheel. With large aperture, long focal length telescopes and a large enough sensor, it can also be used further away to produce a longer spectrum.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eStar Analyser 100:\u003c\/strong\u003e This grating has lower dispersion and is intended for longer optical paths, such as when it is threaded onto the nosepiece of a camera. Using an SA100 inside a filter wheel would produce a spectrum that is too short and compressed.\u003c\/li\u003e\n      \u003c\/ul\u003e\n      \u003cp\u003eIf you use a filter wheel for your imaging, the SA200 is the correct tool. Where there is room to place the grating at its optimum distance, use the SA100; the SA200 also suits large aperture, long focal length telescopes with larger camera sensors, where it produces a longer spectrum.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the Shelyak Star Analyser 200?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou use the Star Analyser 200 just like a standard filter. Simply thread it into an empty slot in your 1.25\" filter wheel (for a 2\" screw-in filter wheel, mount it in a blank 2\" filter cell, not supplied). When you rotate it into the light path, your camera will capture an image where each star is accompanied by its spectrum. No other changes to your imaging process are required.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I learn from a low-resolution spectrum of a star like Albireo (Beta Cygni)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eEven with the low resolution of the Star Analyser 200, you can clearly distinguish the spectral types of the two components of Albireo. You will see the spectrum of the golden K-type giant star (Albireo A) is rich in absorption lines in the orange\/red part of the spectrum, while the blue B-type main-sequence star (Albireo B) shows strong hydrogen lines in the blue\/green. This provides a direct, visual confirmation of their different stellar classifications.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Star Analyser 200 work with my 8\" SCT and a filter wheel?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, absolutely. An 8\" SCT with a filter wheel is an ideal setup for the Star Analyser 200. The instrument's aperture provides plenty of light for capturing spectra of even moderately faint stars, and the SA200's design is specifically optimized for the short distance between the filter wheel and the camera sensor.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose the Star Analyser 200 over the Star Analyser 100?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eChoose the \u003cstrong\u003eStar Analyser 200\u003c\/strong\u003e if you are mounting the grating in a \u003cstrong\u003efilter wheel\u003c\/strong\u003e. Its design is optimized for the very short distance between the filter and the sensor. Choose the \u003cstrong\u003eStar Analyser 100\u003c\/strong\u003e if you are mounting the grating further away, for example, by threading it onto the \u003cstrong\u003enosepiece of your camera\u003c\/strong\u003e.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need special software to process spectra from the Star Analyser 200?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWhile you can view the raw images with any FITS viewer, dedicated spectroscopy software is needed to calibrate the spectrum and extract scientific data. Commercial and free software options such as \u003cstrong\u003eRSpec\u003c\/strong\u003e, \u003cstrong\u003eVSpec\u003c\/strong\u003e, or \u003cstrong\u003eBASS Project\u003c\/strong\u003e are designed to work with data from the Star Analyser and can help you process your images into meaningful graphs of intensity versus wavelength.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of objects can I observe with the Star Analyser 200?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe Star Analyser 200 is best suited for point sources like stars. Excellent targets for beginners include:\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eStellar Classification:\u003c\/strong\u003e Compare the spectra of stars with different spectral types, like Vega (Type A), Capella (Type G), and Betelgeuse (Type M).\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eUnique Stars:\u003c\/strong\u003e Observe emission lines in Wolf-Rayet stars or the unique spectra of Carbon stars.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eQuasars:\u003c\/strong\u003e With a larger telescope, you can even capture the spectrum of a distant quasar like 3C 273 and identify its redshift.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving power (R)\u003c\/td\u003e\n\u003ctd\u003eR ~100 (resolution typically 1\/100 of the wavelength, about 5 nm at 500 nm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-side connection\u003c\/td\u003e\n\u003ctd\u003ethread: M28.5x0.6 (1.25in filter); gender: male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e7.7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Star Analyser 200\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Star_Analyser_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Star Analyser Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44968070971677,"sku":"SHK-PF0040","price":305.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/pf0040-sa200-f-t210x156_158__03510.1671742470.1280.1280.png?v=1684348655"},{"product_id":"shelyak-spacer-for-star-analyser","title":"Shelyak Spacer for Star Analyser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eIncreases Grating-to-Sensor Distance\u003c\/li\u003e\n\u003cli\u003eAdjusts Spectrum Dispersion for Optimal Scale\u003c\/li\u003e\n\u003cli\u003eStackable Design for Custom Spacing\u003c\/li\u003e\n\u003cli\u003eMatches Spectrum Length to Sensor and Pixel Size\u003c\/li\u003e\n\u003cli\u003eMaintains the Star Analyser's Intrinsic Resolution\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Spacer for Star Analyser\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Spacer for Star Analyser is a fundamental accessory for tuning the dispersion of your spectra. By physically increasing the distance between the Star Analyser \u003ca href=\"\/en-int\/collections\/gratings-and-slits\"\u003ediffraction grating\u003c\/a\u003e and your camera's sensor, this spacer spreads the spectrum over more pixels, optimizing the image scale for your specific instrument setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAdjusting Dispersion: Match Your Star Analyser to Your Sensor\u003c\/h3\u003e\n\u003cp\u003eIn the simple optical path of the Star Analyser, the spectral dispersion is directly proportional to the grating's distance from the sensor. This spacer provides a simple, mechanical way to increase that distance, physically lengthening the spectrum captured on your camera's chip. This is useful when the grating sits closer to the sensor than the recommended distance, for example with a larger camera sensor, where the spectrum might otherwise be too compressed.\u003c\/p\u003e\n\u003cp\u003eIt is critical to understand that while this spacer increases dispersion, it does not increase resolution. The \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e's ability to resolve fine spectral details is an intrinsic property of the grating itself. This spacer simply spreads the existing detail over a larger area, it does not create new detail. For maximum flexibility, these spacers can be stacked to achieve even greater separation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary function of the Shelyak Spacer for Star Analyser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts primary function is to increase the physical distance between the Star Analyser's diffraction grating and your camera sensor. This action spreads the star's spectrum out over a larger area of the sensor, a property known as increasing the \u003cstrong\u003edispersion\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes adding the Shelyak Spacer improve the resolution of my spectra?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, it is very important to note that it does not. The spacer increases \u003cstrong\u003edispersion\u003c\/strong\u003e (the physical length of the spectrum on the sensor) but does not change the \u003cstrong\u003eresolution\u003c\/strong\u003e (the ability to distinguish fine details). Resolution is an intrinsic characteristic of the Star Analyser grating itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Shelyak Spacer help when imaging the spectrum of a star like Vega (Alpha Lyrae) with a large-format camera?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhen the grating sits close to a large camera sensor, a star's spectrum can appear short and compressed. By using the Shelyak Spacer, you can increase the dispersion to spread the spectrum of Vega across more pixels, making its characteristic absorption lines easier to sample, see, and measure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Shelyak Spacer useful for a planetary camera with small pixels?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNot because of the pixel size itself. At the same distance, smaller pixels already sample the spectrum more finely, since dispersion per pixel is proportional to pixel size divided by the grating-to-sensor distance. Add spacers when your grating-to-sensor distance is below the recommended minimum for your sensor size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use more than one Shelyak Spacer for my Star Analyser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the spacers are designed to be stackable. You can thread multiple spacers together to achieve a greater distance between the grating and sensor, which will further increase the dispersion of the resulting spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs there any downside to using the Shelyak Spacer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main trade-off is surface brightness. As you increase the dispersion, the light from the star is spread over more pixels. This reduces the brightness of the spectrum at any given point, which may require longer exposure times to achieve the same signal-to-noise ratio, especially for fainter targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits (mount \/ scope)\u003c\/td\u003e\n\u003ctd\u003eShelyak Star Analyser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e7-10 (adjustable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Spectrograph\u003c\/td\u003e\n\u003ctd\u003eShelyak Star Analyser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Spacer for Star Analyser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Star_Analyser_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Star Analyser Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":44968071037213,"sku":"SHK-BA0014","price":48.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/products\/BA0014-Spacer-T201x150_13__54747.1671743305.1280.1280.png?v=1684348656"},{"product_id":"shelyak-ba0001","title":"Shelyak Lhires III 2-inch adapter","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts Lhires III Spectroscope to 2-inch focusers\u003c\/li\u003e\n\u003cli\u003eProvides a secure, non-flexing connection\u003c\/li\u003e\n\u003cli\u003eEnables use with a wider range of telescopes\u003c\/li\u003e\n\u003cli\u003eMachined for precise optical alignment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eLhires III 2-inch adapter\u003c\/h2\u003e\n      \u003cp\u003eThe Lhires III 2-inch adapter provides a robust and secure mechanical link between your Shelyak Lhires III \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e and any standard 2-inch telescope \u003ca href=\"\/en-int\/collections\/focusers\"\u003efocuser\u003c\/a\u003e. This simple but essential component ensures precise optical alignment and rigidity, preventing flexure that can compromise spectroscopic data. It allows you to mount your Lhires III on larger telescopes that are typically equipped with 2-inch focusers, expanding your instrument's compatibility.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eSecure Mounting for the Lhires III in 2-inch Focusers\u003c\/h3\u003e\n      \u003cp\u003eShelyak connects the Lhires III to a telescope either with this standard 50.8 mm (2-inch) adapter or with the screw adapter for Meade and Celestron \u003ca href=\"\/en-int\/collections\/schmidt-cassegrain-telescopes\"\u003eSCTs\u003c\/a\u003e. By converting the input of the spectroscope to a 2-inch barrel, it lets you mount the Lhires III in the 2-inch \u003ca href=\"\/en-int\/collections\/visual-adapters\"\u003eeyepiece holder\u003c\/a\u003e of your telescope.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Lhires III 2-inch adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter allows you to mount your \u003cstrong\u003eShelyak Lhires III spectroscope\u003c\/strong\u003e into a standard \u003cstrong\u003e2-inch telescope focuser\u003c\/strong\u003e. It provides a secure, rigid connection, ensuring correct optical alignment for accurate data acquisition.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this adapter for my Lhires III?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYou need this adapter if you want to mount the Lhires III in a 2-inch focuser. For Meade and Celestron SCTs, the Lhires III can instead use the SCT screw adapter.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Lhires III 2-inch adapter attach?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt is a 2-inch barrel that slides into your telescope's 2-inch eyepiece holder and is secured by the focuser's compression ring or set screws, just like a standard 2-inch \u003ca href=\"\/en-int\/collections\/eyepieces\"\u003eeyepiece\u003c\/a\u003e.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003ethread: 2in barrel; gender: barrel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits (mount \/ scope)\u003c\/td\u003e\n\u003ctd\u003eLhires III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Spectrograph\u003c\/td\u003e\n\u003ctd\u003eLhires III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Lhires III 2-inch adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943026290973,"sku":"SHK-BA0001","price":141.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Lhires-III-2-inch-adapter-1_ab4109a8-edcb-4498-9cab-1b087d5b3f84.jpg?v=1789615786"},{"product_id":"shelyak-ba0023","title":"Shelyak Adapter Ring for T-Mount Camera to Canon EOS Lens (M42x0.75)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMounts a T-mount (M42x0.75) camera on a Canon EOS lens\u003c\/li\u003e\n\u003cli\u003eProvides the M42x0.75 T-thread for the camera\u003c\/li\u003e\n\u003cli\u003eAttaches the acquisition camera to the Canon EOS lens of the eShel spectroscope\u003c\/li\u003e\n\u003cli\u003eRing thickness: 9 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eAdapter Ring for Canon EOS to T-Mount (M42x0.75)\u003c\/h2\u003e\n      \u003cp\u003eThis adapter ring connects a T-mount camera (M42x0.75) to the Canon EOS lens of the Shelyak eShel fiber-fed \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e system. The ring is 9 mm thick.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eConnect a T-Mount Camera to the eShel Canon EOS Lens\u003c\/h3\u003e\n      \u003cp\u003eThe eShel \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e focuses its echelle spectrum on the camera through a Canon EOS lens. The CCD acquisition camera mounts on this lens with the proper adapter, and this ring (BA0023) is that adapter for T-mount cameras such as the QSI516ws or QSI532ws.\u003c\/p\u003e\n      \u003cp\u003eTo mount a Canon EOS camera body on a T-threaded instrument instead, use the complementary T-Mount to Canon EOS DSLR Adapter Ring (BA0043).\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary function of this Adapter ring EOS \/ T-mount?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt connects a T-mount (M42x0.75) camera to a Canon EOS lens, as used on the Shelyak eShel spectroscope, where it holds the acquisition camera on the eShel objective lens.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this ring to attach a Canon EOS camera body to my telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. This ring mounts a T-mount camera on a Canon EOS lens. To attach a Canon EOS camera body to a T-threaded instrument, use the T-Mount to Canon EOS DSLR Adapter Ring (BA0043).\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the eShel lens focused with this ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eBy hand. Shelyak focuses the eShel Canon EOS lens on a Thorium-Argon spectrum: you simply turn the lens to focus, adjusting it to minimize the width of an isolated emission line.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat accessories besides a telescope use the M42x0.75 T-mount thread?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe M42x0.75 T-thread is a common standard in astronomy, found on accessories such as:\u003c\/p\u003e\n    \u003cul\u003e\n    \u003cli\u003e\n\u003ca href=\"\/en-int\/collections\/filter-wheels\"\u003eFilter wheels\u003c\/a\u003e and \u003ca href=\"\/en-int\/collections\/filter-wheels-and-drawers\"\u003efilter drawers\u003c\/a\u003e\n\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/en-int\/collections\/autoguiding\"\u003eOff-axis guiders\u003c\/a\u003e (OAGs)\u003c\/li\u003e\n    \u003cli\u003e\n\u003ca href=\"\/en-int\/collections\/flatteners-and-reducers\"\u003eField flatteners\u003c\/a\u003e and focal reducers\u003c\/li\u003e\n    \u003cli\u003e\u003ca href=\"\/en-int\/collections\/coma-correctors\"\u003eComa correctors\u003c\/a\u003e\u003c\/li\u003e\n    \u003cli\u003eExtension tubes for adjusting back focus\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this ring fit on a Canon EOS camera body?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. This ring takes the place of the camera body on a Canon EOS lens: the lens mounts on the ring and the T-mount camera attaches to the ring. To mount a Canon EOS camera body on a T-threaded instrument, use the T-Mount to Canon EOS DSLR Adapter Ring (BA0043).\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need anything else to connect my camera to a 2\" focuser using this adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. This ring is not a telescope adapter. It joins a T-mount camera to the Canon EOS lens of the eShel spectroscope; the eShel system connects to the telescope through its Fiber Injection and Guiding Unit (FIGU) and optical fiber.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943026520349,"sku":"SHK-BA0023","price":338.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Adapter-ring-EOS-T-mount-1_f233299b-7662-44cb-ab7b-33777ac934cf.jpg?v=1789615793"},{"product_id":"shelyak-ba0027","title":"Shelyak T-mount adapter ring for SCT","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects Shelyak spectrographs to Schmidt-Cassegrain telescopes\u003c\/li\u003e\n\u003cli\u003eMale M42x0.75 T-mount thread for instrument connection\u003c\/li\u003e\n\u003cli\u003eFemale 2-inch thread for SCT rear-cell attachment\u003c\/li\u003e\n\u003cli\u003eFully compatible with standard 0.63x focal reducers\u003c\/li\u003e\n\u003cli\u003eProvides a rigid, tilt-free threaded connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eT-mount adapter ring for SCT\u003c\/h2\u003e\n      \u003cp\u003eThis T-mount adapter ring for SCT provides a direct M42x0.75 T-thread connection for your \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e, attaching securely to the 2-inch rear cell thread of standard Meade and Celestron telescopes. This essential component is engineered to create a rigid optical train and is fully compatible with common 0.63x \u003ca href=\"\/en-int\/collections\/flatteners-and-reducers\"\u003efocal reducers\u003c\/a\u003e, allowing you to optimize your SCT's focal ratio for \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eSecure M42x0.75 Connection for Shelyak Spectrographs\u003c\/h3\u003e\n      \u003cp\u003eDesigned for scientific instrumentation, this adapter creates a solid, threaded link between your telescope and spectrograph. It is the ideal solution for attaching Shelyak instruments like the \u003ca href=\"\/en-int\/products\/shelyak-alpy-600-spectroscope\"\u003eAlpy 600\u003c\/a\u003e, LISA, or UVEX to any \u003ca href=\"\/en-int\/collections\/schmidt-cassegrain-telescopes\"\u003eSchmidt-Cassegrain telescope\u003c\/a\u003e or accessory with a standard 2-inch male thread.\u003c\/p\u003e\n      \u003cp\u003eThe male M42x0.75 T-threads ensure a non-flexing, perfectly aligned connection to your instrument. Compared to a simple slip-fit nosepiece, this threaded adapter eliminates the possibility of tilt or sag, which is critical for maintaining precise focus and calibration during long spectroscopic exposures.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eFull Compatibility with 0.63x SCT Focal Reducers\u003c\/h3\u003e\n      \u003cp\u003eThis adapter is specifically designed to work seamlessly with the classic 0.63x focal reducers used on most SCTs. By placing the reducer between the telescope and this adapter, you can shorten your instrument's effective focal length and increase its light-gathering speed.\u003c\/p\u003e\n      \u003cp\u003eAchieving a faster focal ratio is highly advantageous for spectroscopy, as it concentrates more light onto the spectrograph's slit, increasing signal-to-noise ratio and reducing required exposure times for faint targets. This adapter ensures you can integrate a reducer into your imaging train without compatibility issues.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary use for this SCT T-mount adapter ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter's primary function is to connect an instrument with a female T-thread (M42x0.75), such as a Shelyak spectrograph or a DSLR camera with a \u003ca href=\"\/en-int\/collections\/imaging-adapters\"\u003eT-ring\u003c\/a\u003e, directly to the rear cell of a Schmidt-Cassegrain telescope (SCT) that uses a standard 2-inch thread.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhich specific Shelyak instruments is this SCT T-mount adapter designed for?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter is confirmed to be compatible with a range of Shelyak instruments, including the \u003cstrong\u003eeShel FIGU\u003c\/strong\u003e, \u003cstrong\u003eAlpy 600\u003c\/strong\u003e, \u003cstrong\u003eLISA\u003c\/strong\u003e, and \u003cstrong\u003eUVEX\u003c\/strong\u003e spectrographs, allowing them to be securely mounted on Meade or Celestron SCTs.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter work with my Celestron EdgeHD 8\" telescope?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The Celestron EdgeHD 8\" uses the standard 2-inch SCT thread on its rear cell, making it fully compatible with this adapter. You can thread the adapter directly onto the telescope's visual back or onto a compatible focal reducer.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this SCT T-mount adapter with a 0.63x focal reducer on my Meade LX200?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAbsolutely. This adapter is specifically designed for this scenario. You would first thread your 0.63x reducer onto the rear cell of your Meade LX200, and then thread this adapter onto the male threads of the focal reducer.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the thread sizes on this SCT T-mount adapter ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe adapter features two standard threads:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eTelescope Side:\u003c\/strong\u003e A female 2-inch (50.8mm) thread to attach to an SCT.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eInstrument Side:\u003c\/strong\u003e A male M42x0.75 T-mount thread to attach to a camera or spectrograph.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy should I use this threaded SCT T-mount adapter instead of a 2\" nosepiece for my spectrograph?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eA threaded connection is significantly more secure and rigid than a slip-fit nosepiece held by set screws. For sensitive applications like spectroscopy, this adapter prevents instrument tilt and flexure, ensuring that your calibration and focus remain stable throughout an imaging session.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInstrument Connection\u003c\/td\u003e\n\u003ctd\u003eMale T-Thread (M42x0.75)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eTelescope Connection\u003c\/td\u003e\n\u003ctd\u003eFemale 2-inch SCT Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eShelyak eShel FIGU, Alpy 600, LISA, UVEX; 0.63x Focal Reducers\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eT-mount adapter ring for SCT\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943026782493,"sku":"SHK-BA0027","price":135.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-T-mount-adapter-ring-for-SCT-1_146119ff-7909-4e18-be3f-f81f410526d6.jpg?v=1789615802"},{"product_id":"shelyak-ba0034","title":"Shelyak C-mount to T-mount adapter ring","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMale M42x0.75mm T-mount thread on one side, female 25.4mm C-mount thread on the other\u003c\/li\u003e\n\u003cli\u003eEnables use of larger T-mount cameras on C-mount guide ports or accessories\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eC-mount to T-mount adapter ring\u003c\/h2\u003e\n      \u003cp\u003eThis C-mount to T-mount adapter ring physically connects two essential standards in astronomical and industrial imaging. It features a male M42x0.75mm T-thread on one side and a female internal 25.4mm C-mount thread on the other, providing a simple, rigid solution for integrating hardware that would otherwise be incompatible.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eConnecting T-Mount Cameras to 25.4mm C-Mount Ports\u003c\/h3\u003e\n      \u003cp\u003eThe primary function of this adapter is to mount a camera with T-threads—such as a DSLR or a large-sensor \u003ca href=\"\/en-int\/collections\/cameras\"\u003eastronomy camera\u003c\/a\u003e—onto a C-mount port such as a guide port. This is a common requirement when using an \u003ca href=\"\/en-int\/collections\/autoguiding\"\u003eoff-axis guider\u003c\/a\u003e's guide port, a \u003ca href=\"\/en-int\/collections\/microscopes\"\u003emicroscope\u003c\/a\u003e \u003ca href=\"\/en-int\/collections\/eyepieces\"\u003eeyepiece\u003c\/a\u003e port, or other specialized optical equipment that defaults to the smaller C-mount standard. This converter allows you to use your preferred, often larger, \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguide camera\u003c\/a\u003e where only a C-mount was previously possible. Note that depending on your camera's sensor position, an additional C\/CS-mount spacer ring may be required to achieve the correct back focus.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary use for this C-mount to T-mount adapter ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIts main purpose is to mount a camera with T-threads (M42x0.75mm) on a C-mount (25.4mm) port: the ring has a male M42x0.75 thread on one side and a female 25.4mm C-mount thread on the other. This is most often used to connect a larger format guide camera to a smaller C-mount guide port on an off-axis guider or \u003ca href=\"\/en-int\/collections\/finder-scopes\"\u003efinderscope\u003c\/a\u003e.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the exact thread specifications for this adapter ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe adapter has two distinct threads:\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eMale Thread:\u003c\/strong\u003e M42x0.75mm, commonly known as T-mount or T2-mount.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eFemale Thread:\u003c\/strong\u003e 25.4mm (1-inch) diameter with 32 threads per inch, which is the C-mount standard.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this adapter to attach my DSLR camera to a microscope C-mount port?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, this is a valid application. If your DSLR has a standard \u003ca href=\"\/en-int\/collections\/imaging-adapters\"\u003eT-ring\u003c\/a\u003e attached (which provides a female M42x0.75mm thread), this adapter will allow you to screw it directly onto a C-mount photo port on a microscope, assuming you can achieve focus.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need additional spacers for my guide camera to reach focus with this adapter ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003ePossibly. The C-mount standard has a flange-to-sensor distance of 17.526mm, while the related CS-mount is 12.5mm. If your guide camera is CS-mount native, you will likely need a 5mm C\/CS spacer ring in the optical train to reach focus. This adapter does not change that fundamental spacing requirement.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs this adapter the same as a T-ring for a camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo. A T-ring adapts a specific camera brand's lens mount (like Canon EF or Nikon F) to a female T-thread. This adapter has a male M42x0.75 T-thread on one side and a female 25.4mm C-mount thread on the other. You would typically use a T-ring on your camera first, and then attach this adapter to the T-ring.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eMale Thread\u003c\/td\u003e\n\u003ctd\u003eM42x0.75mm (T-mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFemale Thread\u003c\/td\u003e\n\u003ctd\u003e25.4mm x 32 TPI (C-mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFunction\u003c\/td\u003e\n\u003ctd\u003eAdapts T-mount (male) to C-mount (female)\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eC-mount to T-mount adapter ring\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943027110173,"sku":"SHK-BA0034","price":85.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-C-mount-to-T-mount-adapter-ring-1_a212b217-1888-4862-8fe6-79bd63e0c2df.jpg?v=1789615810"},{"product_id":"shelyak-ba0036","title":"Shelyak C\/CS Adapter Ring (5mm Spacer)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProvides 5mm of critical spacing\u003c\/li\u003e\n\u003cli\u003eAdapts C-mount lenses for use on CS-mount cameras\u003c\/li\u003e\n\u003cli\u003eFits standard C-mount and CS-mount threads\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eC\/CS Adapter Ring (5mm Spacer)\u003c\/h2\u003e\n      \u003cp\u003eThis C\/CS adapter ring provides the essential 5mm of spacing required to achieve perfect focus when using standard C-mount lenses on cameras with a CS-mount. Many modern astronomical \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguide cameras\u003c\/a\u003e and planetary imagers use the CS-mount standard, which has a shorter flange-to-sensor distance than the C-mount standard common on security and industrial lenses.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eBridge the 5mm Back Focus Gap for C-Mount Lenses\u003c\/h3\u003e\n      \u003cp\u003eC-mount lenses are designed to focus at a point farther away from the sensor than a native CS-mount camera can accommodate. Without correction, a C-mount lens will be unable to reach infinity focus on a CS-mount camera. This adapter ring acts as a simple, rigid 5mm extension that precisely bridges this mechanical gap, restoring the correct back focus.\u003c\/p\u003e\n      \u003cp\u003eInstallation is straightforward: simply thread the adapter onto your CS-mount camera body, and then thread your C-mount lens into the adapter. It's a fundamental accessory for anyone repurposing C-mount optics for astronomical imaging and is often paired with a T-mount to C-mount ring for connecting to a telescope's optical train.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is this C\/CS adapter ring used for?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis is a \u003cstrong\u003e5mm spacer\u003c\/strong\u003e designed to let you use a \u003cstrong\u003eC-mount lens\u003c\/strong\u003e on a \u003cstrong\u003eCS-mount camera\u003c\/strong\u003e. It adds the necessary distance between the lens and the camera sensor to allow the lens to achieve proper focus, especially at infinity.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy do I need a 5mm spacer for a C-mount lens on my CS-mount camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe C-mount and CS-mount standards have different back focus requirements, that is the required distance from the lens mounting flange to the sensor plane. C-mount lenses require a longer distance. This 5mm ring provides that exact amount of extra spacing needed for a C-mount lens to work correctly on a CS-mount body.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this C\/CS adapter ring to put a CS-mount lens on a C-mount camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this adapter will not work for that purpose. A CS-mount lens needs to be closer to a C-mount sensor, but this adapter only adds distance. Attempting to use a CS-mount lens on a C-mount camera, even without an adapter, will typically result in an inability to reach focus.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 5mm C\/CS adapter ring work with my CS-mount guide camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. If your guide camera has a CS-mount and you want to use a C-mount lens with it, you will need this 5mm C\/CS adapter ring to achieve focus.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat happens if I don't use this C\/CS adapter ring with my C-mount security lens?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eWithout this 5mm adapter, your C-mount security or industrial lens will not be able to focus on a CS-mount camera. The image will be blurry because the lens cannot be moved far enough away from the sensor to form a sharp image. This ring is the essential component to make that combination work.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow does this C\/CS adapter ring work with a T-mount adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt's common to use a T-to-C-mount adapter to connect a CS-mount camera to a telescope \u003ca href=\"\/en-int\/collections\/focusers\"\u003efocuser\u003c\/a\u003e or other T-threaded accessory. In this setup, the 5mm C\/CS ring would typically be threaded onto the camera first, followed by the T-to-C-mount adapter, ensuring all spacing requirements are met.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003ethread: C-mount; gender: None\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-side connection\u003c\/td\u003e\n\u003ctd\u003ethread: CS-mount; gender: None\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n      \u003cdiv\u003e\n        \u003cp class=\"DAV-item-title\"\u003eC\/CS Adapter Ring\u003c\/p\u003e\n        \u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n      \u003c\/div\u003e\n    \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943027372317,"sku":"SHK-BA0036","price":60.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-C-CS-adapter-ring-1_f0cb25ff-f190-43f0-a271-1d8c1ba476c5.jpg?v=1789615818"},{"product_id":"shelyak-ba0043","title":"Shelyak T-Mount to Canon EOS DSLR Adapter Ring","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConnects Canon EOS DSLR camera bodies to T-Mount accessories\u003c\/li\u003e\n\u003cli\u003eT-mount thread (M42x0.75)\u003c\/li\u003e\n\u003cli\u003eSpecifically recommended for Shelyak LISA, Lhires III, Alpy, and UVEX spectroscopes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eT-Mount to Canon EOS DSLR Adapter Ring\u003c\/h2\u003e\n      \u003cp\u003eThe T-Mount to Canon EOS DSLR Adapter Ring creates the essential physical connection between your camera body and any astronomical accessory with male T-threads. This ring allows you to mount a Canon EOS digital camera directly to instruments like the Shelyak LISA, Lhires III, Alpy, or UVEX \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e. It transforms your DSLR from a photographic tool into a component of a scientific instrument, enabling you to capture stellar and nebular spectra.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eSecure Mechanical Link for Canon EOS Astrophotography\u003c\/h3\u003e\n      \u003cp\u003eThis adapter provides a rigid, non-rotating connection between the Canon EOS bayonet mount and the universal T-thread standard (M42x0.75).\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n  \n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eDesigned for Shelyak Spectroscopes: LISA, Lhires III, Alpy \u0026amp; UVEX\u003c\/h3\u003e\n      \u003cp\u003eWhile this \u003ca href=\"\/en-int\/collections\/imaging-adapters\"\u003eT-ring\u003c\/a\u003e works with any T-threaded accessory, it is the specific adapter recommended for attaching a Canon DSLR to Shelyak spectroscopes. Whether you are using a LISA, Lhires III, Alpy, or UVEX model, this ring provides the correct interface for a direct and stable attachment. This enables you to leverage your existing camera sensor for astrophysical research, such as classifying stars or analyzing the composition of nebulae.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary function of this T-Mount to Canon EOS adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis adapter's primary function is to connect a \u003cstrong\u003eCanon EOS DSLR camera body\u003c\/strong\u003e to an accessory that has male \u003cstrong\u003eT-threads (M42x0.75)\u003c\/strong\u003e. It allows you to use your camera for astrophotography or scientific applications like \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e by physically attaching it to telescopes, spectrographs, or other T-threaded optical equipment.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill this adapter work with my Shelyak Lhires III spectroscope and a Canon 5D Mark IV?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, absolutely. This is the correct adapter for connecting any Canon EOS camera body, including a full-frame model like the 5D Mark IV, to a Shelyak Lhires III spectroscope. The ring mates the camera's EF bayonet mount to the T-threads on the spectroscope for a secure fit.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eI have a Canon EOS Rebel T7i. Can I use it for spectroscopy on an Alpy 600 with this ring?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. This T-ring is fully compatible with all Canon EOS cameras, including the Rebel series with APS-C sensors like the T7i. It will allow you to mount your camera directly to the \u003ca href=\"\/en-int\/products\/shelyak-alpy-600-spectroscope\"\u003eShelyak Alpy 600 spectroscope\u003c\/a\u003e to begin your spectroscopy work.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs this the correct adapter to attach a Canon EF lens to a T-mount camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this adapter works in the opposite direction. It attaches a \u003cstrong\u003eCanon camera body\u003c\/strong\u003e to a \u003cstrong\u003eT-thread accessory\u003c\/strong\u003e. The adapter needed to attach a Canon EF lens to a T-mount camera is the complementary ring, part number BA0023.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the thread size of the T-Mount side of this adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe T-Mount, also known as a T2-mount, uses a standardized thread of \u003cstrong\u003eM42x0.75\u003c\/strong\u003e. This means it has a 42mm diameter with a 0.75mm thread pitch. This is a common standard in astronomy but should not be confused with the M42x1 \"Pentax screw mount\" used in older photography lenses.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the T-ring to my Canon EOS camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eAttaching the T-ring is just like attaching a lens. With the camera body cap off, align the red dot on the T-ring with the red dot on your camera's lens mount. Gently press the ring against the mount and turn it clockwise until it clicks into place.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943027536157,"sku":"SHK-BA0043","price":66.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-T-Mount-to-Canon-EOS-DSLR-adapter-ring-1_f1cea38f-d6a3-4044-82ff-bcce101deba1.jpg?v=1789615826"},{"product_id":"shelyak-dc0012","title":"Shelyak DC0012 – Oleron 2003","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFoundational text from the 2003 Oléron Pro\/Am astrophysics school\u003c\/li\u003e\n\u003cli\u003eIn-depth chapter on the physics of optical spectroscopy\u003c\/li\u003e\n\u003cli\u003eDescribes spectrographs for amateur spectroscopy\u003c\/li\u003e\n\u003cli\u003eDetailed guide to spectral data reduction using software like VisualSpec\u003c\/li\u003e\n\u003cli\u003eExpert reviews on the spectroscopy of the Sun, Be stars, and comets\u003c\/li\u003e\n\u003cli\u003eAuthored by leading professional and amateur astronomers\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eDC0012 – Oleron 2003\u003c\/h2\u003e\n\u003cp\u003eOleron 2003 is the foundational text born from the landmark 2003 Pro\/Am astrophysics school, compiling expert lectures on the physics of \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e, \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e design, data reduction, and scientific applications for studying the Sun, Be stars, and comets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFrom First Principles: The Physics of Optical Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eThis book begins with a rigorous foundation in the physics of light, authored by professional astronomer Alain Klotz. This chapter moves beyond simple concepts to provide the in-depth knowledge required to understand how spectra are formed and what they reveal about celestial objects, a critical first step for any serious practitioner.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePractical Tools: Designing and Using Amateur Spectrographs\u003c\/h3\u003e\n\u003cp\u003eAuthored by the renowned Christian Buil, the section on instrumentation describes some spectrographs for amateur spectroscopy. The Lhires III high resolution spectrograph was one of the instruments later developed from the outcomes of Oleron 2003.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFrom Raw Data to Science: Spectral Data Reduction Techniques\u003c\/h3\u003e\n\u003cp\u003eA raw spectrum is just the beginning. Valérie Desnoux, author of the widely-used VisualSpec software, provides a clear, step-by-step guide to the process of spectral data reduction. This chapter is essential for learning how to calibrate your data and extract scientifically valid information from your observations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eApplied Pro\/Am Science: Analyzing the Sun, Be Stars, and Comets\u003c\/h3\u003e\n\u003cp\u003eThe final sections demonstrate the scientific power of amateur spectroscopy through specific case studies. Jean-Pierre Rozelot reviews how pressure and gravity waves inform our knowledge of the Sun's interior. Coralie Neiner provides a key review of Be stars, a field ripe for Pro\/Am collaboration, while Nicolas Biver details the analysis of molecules in cometary spectra. Agnès Acker, a professional astronomer specialized in planetary nebulae, describes the spectrometry of nebulae: how nebular emission lines form and how to derive nebular temperature and density from the optical spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWho is the intended reader for the Oleron 2003 book?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eOleron 2003\u003c\/strong\u003e is aimed at serious amateur astronomers who want to move beyond visual observation or imaging and engage in scientific astronomical spectroscopy. It provides the foundational physics, hardware knowledge, and data processing techniques necessary to contribute to Pro\/Am collaborations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the information in Oleron 2003 still relevant today?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. While some of the hardware discussed in 2003 has evolved since, the core content of Oleron 2003 is timeless. The fundamental physics of light, the principles of spectral data reduction, and the astrophysical analysis of stars and comets remain the bedrock of modern spectroscopy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does Oleron 2003 help an amateur wanting to study Be stars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe chapter on Be stars by Coralie Neiner is a key review of these objects, which are non-supergiant B-type stars showing emission lines. \u003cstrong\u003eOleron 2003\u003c\/strong\u003e explains the significance of these lines and outlines the observational techniques needed to monitor them, a field where amateur contributions are highly valued by professional astronomers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat practical spectrograph information is in Oleron 2003?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe chapter by Christian Buil in \u003cstrong\u003eOleron 2003\u003c\/strong\u003e describes various spectrographs suitable for amateur use. It covers spectrographs for amateur spectroscopy; the Lhires III was later developed based on the conference's outcomes. This provides a strong conceptual basis for understanding or even building your own instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes Oleron 2003 cover how to process my spectral data?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The chapter by Valérie Desnoux, the creator of VisualSpec software, is dedicated to the process of spectral data reduction. \u003cstrong\u003eOleron 2003\u003c\/strong\u003e walks you through the necessary steps to turn raw light frames into a calibrated, scientifically useful spectrum, which is often the most challenging part for newcomers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eAs a solar observer, what can I learn from Oleron 2003?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe chapter by Jean-Pierre Rozelot in \u003cstrong\u003eOleron 2003\u003c\/strong\u003e provides an excellent review of our Sun. It details how the study of pressure and gravity waves through helioseismology gives astronomers information about the solar interior, offering a deeper physical context for your solar observations beyond surface features.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd colspan=\"2\" style=\"text-align:center;\"\u003eThere are no specifications for this product.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eOleron 2003 Book\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943027765533,"sku":"SHK-DC0012","price":59.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-DC0012-Oleron-2003-1_b633f457-ab12-4393-805f-944272204d3b.jpg?v=1789615835"},{"product_id":"shelyak-dc0027","title":"Shelyak Practical Guide to Starting in Astronomical Spectroscopy (French edition)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eLanguage: French\u003c\/li\u003e\n\u003cli\u003eAuthor: François Cochard (Co-founder of Shelyak Instruments)\u003c\/li\u003e\n\u003cli\u003eFocus: Practical guide for slit-based spectroscopy\u003c\/li\u003e\n\u003cli\u003ePrerequisites: None required\u003c\/li\u003e\n\u003cli\u003eAlso available in English\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePractical Guide to Starting in Astronomical Spectroscopy (French edition)\u003c\/h2\u003e\n\u003cp\u003eAuthored by François Cochard, co-founder of Shelyak Instruments, the \u003cem\u003eGuide pratique pour (bien) débuter en spectroscopie astronomique\u003c\/em\u003e is a hands-on manual designed to take amateur astronomers from initial setup to their first physical measurements. With a preface by Claude CATALA, former President of the Paris Observatory, this guide focuses on the practical steps and methods needed to succeed with a slit \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e, making a complex science accessible without any prior coursework in astrophysics or optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Practical Field Guide to Astronomical Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eThis book is explicitly not a theoretical textbook. Instead, it serves as a step-by-step field guide that prioritizes common sense and practical methodology. It addresses the most common hurdles beginners face, such as integrating multiple pieces of equipment like the telescope, spectroscope, and camera into a functioning system for a night of observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eGo from Zero to Your First Spectrum, Step-by-Step\u003c\/h3\u003e\n\u003cp\u003eThe guide is structured to build your skills progressively, assuming no prior knowledge. It walks you through preparing your instrument and conducting observations, which are often the most challenging stages for newcomers. The goal is to help you acquire your first stellar spectra quickly and with confidence, laying a solid foundation for more advanced work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMaster Your Slit Spectroscope and Data Reduction\u003c\/h3\u003e\n\u003cp\u003eWhile accessible to all, the content is focused and rigorous. You will learn the specific techniques required to operate a slit spectroscope effectively. The book then guides you through the process of reducing your data, teaching you how to analyze your results with increasing precision until you are making genuine physical measurements of celestial objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAuthored by Shelyak Instruments Co-Founder François Cochard\u003c\/h3\u003e\n\u003cp\u003eBenefit from the experience of a leading expert in the field. François Cochard's role at Shelyak Instruments provides him with unparalleled insight into the practical challenges and solutions in amateur spectroscopy. This guide distills years of professional and personal experience into a clear, actionable resource for the amateur community.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHow This Guide Differs from an Astrophysics Textbook\u003c\/h3\u003e\n\u003cp\u003eMany astronomy books explain the \"what\" and \"why\" of astrophysics. This guide focuses mainly on the \"how,\" with the astrophysics and optics you need along the way. It is a procedural manual for operating equipment and acquiring data, not a course on stellar physics.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAstrophysics Textbook:\u003c\/strong\u003e Focuses on the physics of stars, spectral classification theory, and mathematical models. It explains what spectral lines mean.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis Practical Guide:\u003c\/strong\u003e Focuses on setting up your telescope, aligning the spectroscope, guiding on a star's slit image, and processing the resulting data files. It explains how to capture the data that reveals those spectral lines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Spectroscopy Guide suitable for a complete beginner?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The book is written specifically for beginners and requires no prior knowledge of astrophysics or optics. It is a step-by-step guide designed to help you get started from scratch.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat language is the Practical Guide to Spectroscopy written in?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is the \u003cstrong\u003eFrench edition\u003c\/strong\u003e of the book, titled \u003cem\u003e\"Guide pratique pour (bien) débuter en spectroscopie astronomique\"\u003c\/em\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this guide cover data processing after I capture a spectrum?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. A significant part of the book is dedicated to helping you reduce your data. You will learn how to process your initial captures into scientifically useful spectra and understand how to analyze them with increasing rigor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of equipment does this Spectroscopy Guide focus on?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe guide is centered on the use of a \u003cstrong\u003eslit spectroscope\u003c\/strong\u003e, which is the standard for acquiring high-quality, scientifically valuable data. It covers the entire imaging train, including the telescope, the spectroscope itself, and the camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have an 8\" SCT and a Lhires III spectroscope. Will this book help me get started?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this guide is ideal for your situation. It provides practical, on-the-ground advice for setting up and using an instrument combination exactly like yours. The author, as co-founder of Shelyak Instruments, has deep familiarity with the Lhires III.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow will this guide help me get my first spectrum of a star like Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe book will walk you through the entire process for a bright target like Vega. It covers preparing and aligning your equipment, centering Vega's light on the spectroscope's narrow slit, managing guiding during the exposure, and then processing the raw data to reveal the star's characteristic hydrogen absorption lines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTitle\u003c\/td\u003e\n\u003ctd\u003eGuide pratique pour (bien) débuter en spectroscopie astronomique\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAuthor\u003c\/td\u003e\n\u003ctd\u003eFrançois Cochard\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePreface\u003c\/td\u003e\n\u003ctd\u003eClaude CATALA, former President of the Paris Observatory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLanguage\u003c\/td\u003e\n\u003ctd\u003eFrench\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocus\u003c\/td\u003e\n\u003ctd\u003ePractical guide for slit spectroscopy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePractical Guide to Starting in Astronomical Spectroscopy (French edition)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943028158749,"sku":"SHK-DC0027","price":64.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Practical-Guide-to-Starting-in-Astronomical-Spectroscopy-French-edition-1_3e7c61c0-fc82-44c8-b632-cebbafca3188.jpg?v=1789615843"},{"product_id":"shelyak-dc0029","title":"Shelyak DC0029 – Successfully Starting in Astronomical Spectroscopy – A Practical Guide","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eA Practical Guide for Beginners\u003c\/li\u003e\n\u003cli\u003eCovers Equipment Setup\u003c\/li\u003e\n\u003cli\u003eExplains Data Acquisition\u003c\/li\u003e\n\u003cli\u003eDetails Calibration Techniques\u003c\/li\u003e\n\u003cli\u003eFocuses on Real-World Application\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eDC0029 – Successfully Starting in Astronomical Spectroscopy – A Practical Guide\u003c\/h2\u003e\n\u003cp\u003eThis guide, \"Successfully Starting in Astronomical \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003eSpectroscopy\u003c\/a\u003e,\" is the essential starting point for any amateur astronomer looking to venture into the scientific analysis of starlight. Written by François Cochard with a foreword by Claude Catala, it addresses all the issues required to help you quickly obtain quality spectra with a slit \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e. The book demystifies the entire process, from connecting hardware to interpreting your final results.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFrom Theory to First Light: Your First Steps in Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eThis guide removes the guesswork from getting started. It focuses on obtaining quality spectra with a slit spectroscope. You will learn the fundamental principles without getting lost in dense academic theory, focusing instead on the practical knowledge needed for a successful first night out.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAcquiring and Calibrating: A Practical Workflow for Beginners\u003c\/h3\u003e\n\u003cp\u003eCapturing a spectrum is only the beginning. This guide details a repeatable workflow for data acquisition, including how to properly focus the spectrograph, choose appropriate exposure times, and record essential calibration frames. It explains why calibration is critical and shows you how to use flat fields and reference lamp spectra to turn your raw data into a scientifically valid measurement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eInterpreting Your Data: From Raw Spectrum to Scientific Insight\u003c\/h3\u003e\n\u003cp\u003eOnce you have a calibrated spectrum, what does it mean? This manual walks you through the basics of spectral analysis, helping you identify key features like the absorption lines in a star's atmosphere. It provides the context you need to understand what your data reveals about a star's temperature, composition, and motion, transforming your backyard observations into genuine scientific inquiry.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the \"Practical Guide to Spectroscopy\" suitable for a complete beginner?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. As its title says, the book is about starting in astronomical spectroscopy: it addresses all the issues required to help you quickly obtain quality spectra with a slit spectroscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this guide to analyze the spectrum of a bright star like Vega?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, Vega (Alpha Lyrae) is an excellent first target and a perfect example of an A-type star with prominent hydrogen absorption lines. The book is aimed at obtaining quality spectra of stars like this with a slit spectroscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943028453661,"sku":"SHK-DC0029","price":64.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-DC0029-Spectroscopy-practical-guide-1_a1043b49-9352-446a-9c3f-edc0db5ef4fb.jpg?v=1789615851"},{"product_id":"shelyak-el0037","title":"Shelyak Thorium-Argon Lamp for Shelyak Spectrographs","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eElement Composition: Thorium-Argon (ThAr)\u003c\/li\u003e\n\u003cli\u003eLamp Type: Hollow Cathode Lamp (HCL)\u003c\/li\u003e\n\u003cli\u003ePrimary Application: High-resolution spectrograph calibration\u003c\/li\u003e\n\u003cli\u003eDesigned For: Shelyak eShel and Whoppshel spectrographs\u003c\/li\u003e\n\u003cli\u003eOutput: Dense, well-defined emission lines across the spectrum\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eThorium-Argon Lamp for Shelyak Spectrographs\u003c\/h2\u003e\n\u003cp\u003eThis Thorium-Argon (ThAr) hollow cathode lamp is the reference calibration source for Shelyak's high-resolution eShel and Whoppshel \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrographs\u003c\/a\u003e. It is engineered to produce a rich spectrum of sharp, distinct emission lines, providing the necessary data points for an exceptionally precise wavelength calibration across the entire visible spectrum. This component is the replacement bulb for the eShel calibration module, enabling you to maintain the scientific accuracy of your spectroscopic observations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA High-Density Emission Line Source for Echelle Calibration\u003c\/h3\u003e\n\u003cp\u003eThe accuracy of any spectrograph is fundamentally limited by the quality of its wavelength calibration. Thorium-Argon is the standard for professional instruments because it provides thousands of well-characterized emission lines. For an echelle spectrograph, which spreads light into multiple overlapping orders, this density of lines is critical for correctly identifying wavelengths and achieving sub-Angstrom accuracy.\u003c\/p\u003e\n\u003cp\u003eUsing this ThAr lamp, you can create a master calibration frame that maps the unique optical path of your system. This allows the instrument software to precisely assign a wavelength to every pixel on the sensor, transforming raw data into a scientifically valid spectrum for radial velocity studies, stellar classification, and chemical composition analysis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eReplacement Bulb: Essential System Requirements\u003c\/h3\u003e\n\u003cp\u003eThis product is the Thorium-Argon hollow cathode lamp bulb only. It is intended as a direct replacement for a depleted or damaged lamp within an existing Shelyak eShel calibration unit or for custom-built spectroscopic systems. It is not a standalone device and requires specific external hardware to operate.\u003c\/p\u003e\n\u003cp\u003eTo power the lamp and excite the gas to produce its characteristic spectrum, you must have a compatible high-voltage \u003ca href=\"\/en-int\/collections\/power-accessories\"\u003epower supply\u003c\/a\u003e and the appropriate interface cable. These components are part of the complete eShel calibration module but are not included with this replacement bulb. Please ensure your existing power supply and connections are in working order before purchasing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is this Thorium-Argon lamp used for in astronomy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eThorium-Argon lamp\u003c\/strong\u003e is a calibration light source. It produces a very dense and well-known pattern of emission lines. By taking a spectrum of the lamp, astronomers can create a precise map of wavelengths onto the camera's sensor pixels, which is essential for analyzing the spectra of stars and other celestial objects accurately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this a complete, ready-to-use calibration unit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This is the \u003cstrong\u003ereplacement bulb only\u003c\/strong\u003e. It is a component that requires a separate high-voltage power supply and an interface cable to operate. It is designed to be installed into a device like the Shelyak eShel calibration module.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the Thorium-Argon lamp to calibrate my eShel spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe lamp is installed in the eShel calibration module, which feeds the light into the spectrograph via a fiber optic cable. You will take a dedicated calibration exposure of the lamp's spectrum. Using software like Demetra, this known ThAr spectrum is compared to your image to create a precise wavelength solution for all subsequent scientific observations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is Thorium-Argon the standard for the Shelyak Thorium-Argon lamp?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThorium-Argon is the professional standard for high-resolution \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e for two main reasons. First, it produces an extremely high density of emission lines across the visible spectrum. Second, these lines are very sharp and their wavelengths are known to an extremely high degree of accuracy, making the \u003cstrong\u003eShelyak Thorium-Argon lamp\u003c\/strong\u003e an ideal reference source.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat telescope is this Thorium-Argon lamp and eShel system best suited for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eShel system, for which this Thorium-Argon lamp is a component, appears in Shelyak's example spectra on a 0.2 m \u003ca href=\"\/en-int\/collections\/schmidt-cassegrain-telescopes\"\u003eSchmidt-Cassegrain telescope\u003c\/a\u003e. The standard eShel Fiber Injection and Guiding Unit works at F\/6, typically on a Schmidt-Cassegrain with a 0.63x \u003ca href=\"\/en-int\/collections\/flatteners-and-reducers\"\u003efocal reducer\u003c\/a\u003e; F\/9 and other F-ratios are available on request. The goal is to achieve sufficient light grasp to record high-resolution spectra of moderately bright stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to power this Thorium-Argon lamp?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will need a specific \u003cstrong\u003ehigh-voltage power supply\u003c\/strong\u003e designed for hollow cathode lamps, as well as the correct interface cable. These items are not included with the bulb. This lamp is intended as a direct replacement for the one included in the complete Shelyak eShel calibration module, which already contains the necessary power electronics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits (mount \/ scope)\u003c\/td\u003e\n\u003ctd\u003eeShel, Whoppshel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Spectrograph\u003c\/td\u003e\n\u003ctd\u003eeShel, Whoppshel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eThorium-Argon hollow cathode lamp (bulb only)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943028715805,"sku":"SHK-EL0037","price":1580.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Thorium-Argon-lamp-1_be0533dc-5749-40e8-a2c9-3a3d8e3f86fd.jpg?v=1789615859"},{"product_id":"shelyak-el0073","title":"Shelyak Power supply 12V\/3A","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDelivers a regulated 12V DC output\u003c\/li\u003e\n\u003cli\u003eProvides up to 3A of current\u003c\/li\u003e\n\u003cli\u003eFeatures a 2.5mm x 5.5mm barrel connector\u003c\/li\u003e\n\u003cli\u003eStandard center-positive polarity\u003c\/li\u003e\n\u003cli\u003eIncludes a European format (220V) mains cable\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePower supply 12V\/3A\u003c\/h2\u003e\n\u003cp\u003eThis switching power supply provides a regulated 12V DC output at up to 3A through a standard 2.5mm x 5.5mm center-positive barrel connector, suitable for most Shelyak instruments: the Lhires III, the LISA calibration module, the Alpy \/ UVEX calibration module and the SPOX.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e12V\/3A DC Power with a 2.5mm Center-Positive Plug\u003c\/h3\u003e\n\u003cp\u003eShelyak supplies it for most of its instruments: the Lhires III, the LISA calibration module, the Alpy \/ UVEX calibration module and the SPOX. Contact us before using it with the PF0082 high-voltage power supply and the eShel \/ Whoppshel calibration unit.\u003c\/p\u003e\n\u003cp\u003eThe 2.5mm x 5.5mm center-positive plug is one of the most common connectors in the hobby, but you must always verify the power requirements of your specific device before connecting. This power supply ships standard with a European format 220V mains cable; please contact us if you require a 110V US format cable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat devices can I power with this 12V\/3A power supply?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is suitable for most Shelyak instruments: the Lhires III, the LISA calibration module, the Alpy \/ UVEX calibration module and the SPOX. Contact us before using it with the PF0082 high-voltage power supply and the eShel \/ Whoppshel calibration unit. Always check your device's manual for its specific power requirements, including the connector size (2.5mm x 5.5mm) and polarity (center-positive).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this power supply with the PF0082 high-voltage supply or the eShel calibration unit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eContact us first. Shelyak asks to be contacted before this supply is used with the PF0082 high-voltage power supply and the eShel \/ Whoppshel calibration unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 12V\/3A power supply regulated?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is a switching power supply, which means it provides a regulated 12V output. This is crucial for sensitive electronics in astronomy gear, as it protects them from voltage fluctuations and ensures stable operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I check that this supply suits my instrument?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCheck that your instrument takes 12V DC at no more than 3A through a 2.5mm x 5.5mm center-positive plug. Suitable instruments include the Lhires III, the LISA calibration module, the Alpy \/ UVEX calibration module and the SPOX.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is 'center-positive polarity' and why does it matter for this power supply?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCenter-positive polarity means the center pin of the 2.5mm connector is the positive (+) terminal, and the outer barrel is the negative (-). Using a power supply with the wrong polarity can permanently damage the electronics in your instrument. Always confirm your device requires a center-positive connection before plugging it in.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eThe power supply comes with a European cable. How do I get a US version?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe unit includes a European format (220V) mains cable as standard. If you are in a region that uses 110V mains voltage, such as the United States, please contact us to request the appropriate US format cable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput Voltage\u003c\/td\u003e\n\u003ctd\u003e12V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax Current\u003c\/td\u003e\n\u003ctd\u003e3A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003e2.5mm x 5.5mm Barrel Plug\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePolarity\u003c\/td\u003e\n\u003ctd\u003eCenter-Positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Cable\u003c\/td\u003e\n\u003ctd\u003eEuropean (220V) format included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKind\u003c\/td\u003e\n\u003ctd\u003e12V switching power supply\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Power\u003c\/td\u003e\n\u003ctd\u003eMains, European format 220V cable (110V US cable on request)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e12V\/3A Switching Power Supply\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eEuropean (220V) Mains Cable\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943028977949,"sku":"SHK-EL0073","price":43.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Power-supply-12V-3A-1_e66b018e-4113-4125-9035-809d50934954.jpg?v=1789615867"},{"product_id":"shelyak-el0110","title":"Shelyak 0.63x SCT F\/6.3 Focal Reducer","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e0.63x Focal Reduction Factor\u003c\/li\u003e\n\u003cli\u003eTransforms f\/10 Systems to f\/6.3\u003c\/li\u003e\n\u003cli\u003eApochromatic Triplet Optical Design\u003c\/li\u003e\n\u003cli\u003eStandard 2-inch (50.8 mm) SCT Thread\u003c\/li\u003e\n\u003cli\u003eOptimized for Low-Resolution Spectroscopy\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak 0.63x SCT F\/6.3 Focal Reducer\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak 0.63x SCT F\/6.3 Focal Reducer converts a standard f\/10 \u003ca href=\"\/en-int\/collections\/schmidt-cassegrain-telescopes\"\u003eSchmidt-Cassegrain telescope\u003c\/a\u003e into a faster f\/6.3 instrument, specifically for \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e. This 0.63x reduction is achieved with a anti-reflection coated apochromatic triplet. It attaches via a standard 2-inch (50.8 mm) rear cell thread, making it compatible with most Meade and Celestron SCTs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAn Apochromatic Triplet for F\/6.3 Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eTransforming your telescope from f\/10 to f\/6.3 is critical for efficient spectroscopy. The faster focal ratio concentrates the star's light more intensely onto the narrow slit of a \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e like the \u003ca href=\"\/en-int\/products\/shelyak-alpy-600-spectroscope\"\u003eAlpy 600\u003c\/a\u003e or UVEX, dramatically improving signal-to-noise ratio and reducing exposure times on faint targets.\u003c\/p\u003e\n\u003cp\u003eThis unit employs an apochromatic triplet design. This ensures that different wavelengths of light are brought to a single, sharp focal point before entering the spectrograph, preventing chromatic aberration from contaminating your spectral data and ensuring maximum accuracy in your measurements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e2-inch SCT Threads for Meade and Celestron Telescopes\u003c\/h3\u003e\n\u003cp\u003eThis reducer is engineered for seamless integration into the most common catadioptric setups. It features the standard 2-inch (50.8 mm) female thread found on the rear cell of virtually all modern Schmidt-Cassegrain telescopes from Celestron and Meade.\u003c\/p\u003e\n\u003cp\u003eThe output side of the reducer is threaded to accept accessories like the Shelyak variable \u003ca href=\"\/en-int\/collections\/imaging-adapters\"\u003eT-adapter\u003c\/a\u003e (BA0027), allowing you to achieve precise back focus for your specific instrument. This direct-thread system creates a rigid, flexure-free connection between your telescope and spectrograph, which is essential for maintaining alignment throughout a long observation session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMade for Low-Resolution Spectroscopes\u003c\/h3\u003e\n\u003cp\u003eShelyak designed this reducer to bring an F\/10 Schmidt-Cassegrain to F\/6.3 for its low-resolution spectroscopes.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\nSuited instruments: the Alpy 600, UVEX, Star'Ex LR and the eShel injection unit (FIGU).\u003c\/li\u003e\n\u003cli\u003e\nOptics: an anti-reflection coated apochromatic triplet. The variable T-adapter (BA0027) fits directly onto it.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy do I need the Shelyak 0.63x reducer for spectroscopy with my SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA standard f\/10 SCT produces a small, dim image at the focal plane. The \u003cstrong\u003eShelyak 0.63x reducer\u003c\/strong\u003e converts this to f\/6.3, creating a brighter, more concentrated beam of light. This allows more photons to pass through the narrow slit of your spectrograph per unit of time, significantly boosting your signal and allowing you to capture spectra of fainter objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat makes this Shelyak reducer different from a standard Celestron or Meade f\/6.3 reducer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eShelyak builds it as an anti-reflection coated apochromatic triplet and intends it for low-resolution spectroscopes such as the Alpy 600, UVEX, Star'Ex LR and the eShel injection unit (FIGU). The variable T-adapter (BA0027) fits directly onto it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this 0.63x reducer work with my 8\" Celestron SCT and an Alpy 600 spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an ideal combination. The reducer will thread directly onto the 2-inch rear cell of your 8\" SCT. The Alpy 600 is among the low-resolution spectroscopes that F\/6.3 suits better than F\/10.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach the Shelyak 0.63x reducer to my telescope and spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe reducer has female 2-inch SCT threads. You simply unthread your existing \u003ca href=\"\/en-int\/collections\/visual-adapters\"\u003evisual back\u003c\/a\u003e or camera adapter from your telescope's rear cell and thread the reducer on in its place. The output side of the reducer has male threads that connect to other accessories, such as the Shelyak variable T-adapter (BA0027), which then connects to your spectrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eReduction Factor\u003c\/td\u003e\n\u003ctd\u003e0.63x\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResulting Focal Ratio\u003c\/td\u003e\n\u003ctd\u003ef\/6.3 (from f\/10)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical Design\u003c\/td\u003e\n\u003ctd\u003eApochromatic Triplet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCoatings\u003c\/td\u003e\n\u003ctd\u003eAnti-reflective\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Connection\u003c\/td\u003e\n\u003ctd\u003e2-inch (50.8 mm) SCT Female Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eMost Meade \u0026amp; Celestron SCTs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-side connection\u003c\/td\u003e\n\u003ctd\u003e2-inch SCT Male Thread\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e0.63x SCT F\/6.3 Focal Reducer\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943029240093,"sku":"SHK-EL0110","price":348.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-0-63x-SCT-F-6-3-focal-reducer-1_d9c47f69-7c31-4b68-a351-498ceb173434.jpg?v=1789615875"},{"product_id":"shelyak-el0116","title":"Shelyak Spare Lamp for Flats","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eHalogen incandescent bulb, BA9s socket\u003c\/li\u003e\n\u003cli\u003e12V, 6W (500mA) spare bulb for flat images\u003c\/li\u003e\n\u003cli\u003eEnsures Consistent, Repeatable Illumination\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section-center\"\u003e\n      \u003ch2\u003eSpare Lamp for Flats\u003c\/h2\u003e\n      \u003cp\u003eThis is a spare halogen incandescent bulb (BA9s socket, 12V, 6W, 500mA) for flat images. Shelyak's Alpy calibration module uses a halogen flat lamp drawing 500mA. Keeping a spare on hand lets you replace a failed bulb without ending an observing session.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"DAV-bg-light\"\u003e\n    \u003cdiv class=\"DAV-section\"\u003e\n      \u003ch3\u003eHalogen Bulb: BA9s Socket, 12V, 6W\u003c\/h3\u003e\n      \u003cp\u003eA reliable light source is the foundation of accurate data calibration. As an incandescent halogen bulb, it produces a smooth continuous spectrum without emission lines, which is what a spectroscopic flat needs.\u003c\/p\u003e\n      \u003cp\u003eLamps are consumable components with a finite lifespan. Having this spare means that when the lamp eventually fails, you can replace it quickly and continue your observing run.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is this spare lamp for flats used for?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis is a spare halogen incandescent bulb (BA9s socket, 12V, 6W) for taking flat images. Its purpose is to provide a stable, continuous light source for taking flat frames of your spectra.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy do I need a spare lamp for my calibration unit?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eLike any incandescent bulb, the flat lamp in your calibration module has a limited operational life and will eventually burn out. Keeping a spare lamp on hand lets you replace it in the field and continue your work.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is a tungsten lamp used for creating flat frames?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eTungsten filaments produce a continuous, broadband spectrum of light. For spectroscopic flats this gives a smooth spectrum without the emission lines of discharge lamps such as fluorescent tubes.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs this spare lamp compatible with my calibration module?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eIt is a halogen incandescent bulb with a BA9s socket, rated 12V, 6W (500mA). As compatibility varies, you should consult the manual for your calibration device to confirm that this is the correct replacement lamp before purchasing.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943029535005,"sku":"SHK-EL0116","price":19.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Spare-lamp-for-flats-1_3fa02340-a558-4313-92a5-0c321a40f757.jpg?v=1789615883"},{"product_id":"shelyak-el0166","title":"Shelyak Star Analyser 200 Mounting Kit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMounts a Star Analyser 100 or 200 (sold separately) in front of a photo lens\u003c\/li\u003e\n\u003cli\u003eMounting plate 65 mm square with 29 mm hole, plus two 65 mm square thickness plates with 37 mm hole\u003c\/li\u003e\n\u003cli\u003eLocking ring for the 1.25\" filter holder fixes the orientation of the spectrum on the sensor\u003c\/li\u003e\n\u003cli\u003eProvides a stable, correctly aligned mount for consistent results\u003c\/li\u003e\n\u003cli\u003eAlso lets you fit the Star Analyser 200 in filter wheels made for unmounted drop-in filters, where there is enough clearance\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eStar Analyser 200 Mounting Kit\u003c\/h2\u003e\n\u003cp\u003eThis kit makes it easy to mount a \u003ca href=\"\/en-int\/products\/shelyak-star-analyser-100\"\u003eStar Analyser 100\u003c\/a\u003e or 200 \u003ca href=\"\/en-int\/collections\/gratings-and-slits\"\u003ediffraction grating\u003c\/a\u003e in front of a photo lens. It includes a 65 mm square mounting plate with a 29 mm hole, two 65 mm square thickness plates with a 37 mm hole, and a locking ring for the 1.25\" filter holder that fixes the orientation of the spectrum with respect to the camera sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSecure Your Star Analyser 200 for Spectroscopic Imaging\u003c\/h3\u003e\n\u003cp\u003eThe Star Analyser is already mounted in a 1.25\" filter cell. The plates of this kit hold that cell in front of a \u003ca href=\"\/en-int\/collections\/camera-lenses-and-adapters\"\u003ecamera lens\u003c\/a\u003e, the thickness plates add spacing where needed, and the locking ring keeps the spectrum aligned with the sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Star Analyser 200 mounting kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt lets you mount a Star Analyser 100 or 200 in front of a photo lens. The kit holds the grating's 1.25\" filter cell in a 65 mm square mounting plate, adds two thickness plates, and includes a locking ring that fixes the orientation of the spectrum on the sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this mounting kit for my Star Analyser 200?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need it to use your Star Analyser in front of a camera lens, or in a \u003ca href=\"\/en-int\/collections\/filter-wheels\"\u003efilter wheel\u003c\/a\u003e made for unmounted drop-in filters. On a telescope, the Star Analyser's 1.25\" cell screws into a camera nosepiece or a 1.25\" filter wheel without this kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the mounting kit help me get a spectrum of a star like Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe kit holds the Star Analyser in front of your camera lens. Spectra of bright stars can be taken this way, with best results on a tracking mount. Imaging Vega through the grating spreads its light into a spectrum showing the hydrogen Balmer absorption lines typical of an A-type star.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Star Analyser 200 mounting kit compatible with a filter wheel on my SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOnly for wheels made for unmounted drop-in filters, and only with enough clearance. In a filter wheel with 1.25\" threaded slots, the Star Analyser 200 screws in directly without this kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the mounting kit include the Star Analyser 200 grating itself?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this product is only the mounting kit (mounting plate, two thickness plates and locking ring). The \u003ca href=\"\/en-int\/products\/shelyak-star-analyser-200\"\u003eStar Analyser 200\u003c\/a\u003e diffraction grating must be purchased separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Star Analyser fit in the mounting kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Star Analyser stays in its 1.25\" filter cell. The 65 mm square mounting plate (29 mm hole) holds it in front of the lens, the two thickness plates (37 mm hole) add spacing, and the locking ring for the 1.25\" filter holder fixes the orientation of the spectrum with respect to the sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\n\u003ctr\u003e\n\u003ctd\u003eFits spectrograph\u003c\/td\u003e\n\u003ctd\u003eStar Analyser 100, Star Analyser 200\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMounting plate (65 mm square, 29 mm hole)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eThickness plate (65 mm square, 37 mm hole)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eLocking ring for 1.25\" filter holder\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Star_Analyser_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Star Analyser Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943029764381,"sku":"SHK-EL0166","price":65.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Star-Analyser-mounting-kit-1_8663a2dc-6413-493e-b61c-05045f0312d8.jpg?v=1789615891"},{"product_id":"shelyak-el0334","title":"Shelyak High Voltage Power Connector for Shelyak PF0082","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnables Custom Cable Fabrication\u003c\/li\u003e\n\u003cli\u003eDesigned for High-Voltage Applications\u003c\/li\u003e\n\u003cli\u003eDesigned for the Shelyak PF0082 Power Supply\u003c\/li\u003e\n\u003cli\u003eEssential for Spectroscopic Calibration Lamps\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eHigh Voltage Power Connector for Shelyak PF0082\u003c\/h2\u003e\n\u003cp\u003eThis High Voltage Power Connector is the essential component for creating custom \u003ca href=\"\/en-int\/collections\/power-accessories\"\u003epower cables\u003c\/a\u003e for the Shelyak PF0082 high voltage power supply. It is specifically intended for users who need to fabricate a bespoke power cord tailored to the unique connection requirements of various spectroscopic calibration lamps.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCustom Power Cables for the Shelyak PF0082 Power Supply\u003c\/h3\u003e\n\u003cp\u003eThis connector is designed to be used with the Shelyak high voltage power supply, reference PF0082. It provides the necessary termination for building a power cable that precisely matches the input of your chosen calibration lamp, such as Argon, Neon, or a Thorium-Argon unit. By allowing you to construct your own cable, it ensures a secure and correct electrical connection for stable, reliable spectroscopic work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is this High Voltage Power Connector used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis connector is used to create custom-length power cables for various calibration lamps. It allows you to connect a specific lamp to the \u003cstrong\u003eShelyak PF0082 high voltage power supply\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this High Voltage Power Connector compatible with other power supplies?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eShelyak sells it for use with the \u003cstrong\u003eShelyak PF0082 high voltage power supply\u003c\/strong\u003e; it does not list other supplies.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy would I need to make a custom cable with this connector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDifferent calibration lamps (like Neon, Argon, or Thorium-Argon) can have different power input requirements or physical connector types. This component allows you to build a cable that perfectly matches your specific lamp to the PF0082 supply, ensuring a safe and reliable connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the High Voltage Power Connector come with any wire?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this product is the connector only. You will need to source and provide the appropriate high-voltage wire separately to assemble your custom cable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eKind\u003c\/td\u003e\n\u003ctd\u003eHigh-voltage power supply connector (for making lamp cords)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHigh voltage power connector\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943029993757,"sku":"SHK-EL0334","price":28.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-High-Voltage-Power-Connector-1_ddde710c-430f-44ea-9053-9ed76df3ac4d.jpg?v=1789615899"},{"product_id":"shelyak-es0002","title":"Shelyak Lhires III Spectroscope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eResolving power of R=18,000 with the included 2400 lines\/mm grating\u003c\/li\u003e\n\u003cli\u003eSelectable wavelength range from 400 nm to 750 nm\u003c\/li\u003e\n\u003cli\u003eOptimized for F\/10 telescopes like Schmidt-Cassegrains\u003c\/li\u003e\n\u003cli\u003eInterchangeable slit with 15, 19, 23, and 35 µm widths included\u003c\/li\u003e\n\u003cli\u003eIntegrated C-mount guide port with 0.8x focal reducer and 17.5 mm back focus\u003c\/li\u003e\n\u003cli\u003eCompact body weighing 1.7 kg\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Lhires III Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Lhires III Spectroscope delivers a resolving power of R=18,000, enabling detailed analysis of individual spectral lines for astrophysical research. Optimized for F\/10 optical systems, it integrates a 2400 lines\/mm grating and an interchangeable slit with 15, 19, 23, and 35 µm widths to balance resolution and brightness. Its mirror slit design works with the integrated 0.8x C-mount guide port, which provides 17.5 mm of back focus, so the target star can be positioned and held in the slit, and a micrometer selects any wavelength from 400 to 750 nm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Lhires III: A High-Resolution Tool for Stellar Astrophysics\u003c\/h3\u003e\n\u003cp\u003eThe Lhires III is Shelyak's historic instrument, designed at the CNRS Astrophysics School for the observation of Be stars and since used for a wide range of applications. It is the ideal tool for the Doppler effect and for observing star activity, with detail in one or more spectral lines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 200mm Littrow High Resolution Spectrograph (LHIRES) Design\u003c\/h3\u003e\n\u003cp\u003eLhires is an acronym for Littrow High REsolution \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003eSpectrograph\u003c\/a\u003e. In this configuration, the same 200mm focal length lens (30mm diameter) acts as both the \u003ca href=\"\/en-int\/collections\/collimation-tools\"\u003ecollimator\u003c\/a\u003e and the imaging lens. Light passing through the slit is collimated, sent to the reflection grating, and the dispersed spectrum is then focused back through the same lens onto the detector. This avoids separate collimating and focusing lenses, which keeps the Lhires III compact and economical to produce. It weighs 1.7 kg.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eR=18,000 Resolving Power Across the 400-750 nm Range\u003c\/h3\u003e\n\u003cp\u003eWith its standard 2400 lines\/mm grating, the Lhires III achieves a resolving power of R=18,000. This gives access to Doppler velocity measurements and a great deal of detail in the profile of a line. While the high resolution limits the spectral range captured in a single exposure to about 10 nm, a precision micrometer allows you to rotate the grating and center any wavelength between 400 nm and 750 nm on your sensor. You can, for example, centre H-alpha or the sodium D lines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Mirror Slit and 0.8x Focal Reducer Guide Port\u003c\/h3\u003e\n\u003cp\u003ePrecise guiding is essential for high-resolution \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e. The Lhires III employs a highly polished, reflective entrance slit that acts as a mirror for the surrounding starfield. This light goes to the guide port, where a \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguiding camera\u003c\/a\u003e (not supplied) lets you position the star in the slit and autoguide. The guide port is a dual-lens C-mount port (focal ratio 0.8x) with 17.5 mm mechanical backfocus for the guide camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptimized for F\/10 Schmidt-Cassegrain Systems\u003c\/h3\u003e\n\u003cp\u003eThe ideal input focal ratio is F\/10, which suits Schmidt-Cassegrain telescopes; the manual gives an acceptable range of f\/8 to f\/12. \u003ca href=\"\/en-int\/collections\/refractors\"\u003eRefractors\u003c\/a\u003e and \u003ca href=\"\/en-int\/collections\/newtonian-telescopes\"\u003eNewtonians\u003c\/a\u003e work if they are slower than f\/8. For faster telescopes, a \u003ca href=\"\/en-int\/collections\/barlows-and-extenders\"\u003eBarlow lens\u003c\/a\u003e can raise the focal ratio, but check that your telescope has enough back focus, particularly a Newtonian.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSCT Connection and 13mm Back Focus Camera Adapter\u003c\/h3\u003e\n\u003cp\u003eThe Lhires III attaches directly to the rear cell of a Schmidt-Cassegrain telescope with the supplied Schmidt-Cassegrain interface. For a 2-inch \u003ca href=\"\/en-int\/collections\/focusers\"\u003efocuser\u003c\/a\u003e, use the optional 2-inch adapter. On the detector side, the instrument includes a CCD adapter designed for ATIK cameras, (13 mm mechanical backfocus). Shelyak offers other adapter rings for different cameras in its accessories catalogue, and the manual says there is enough back focus to use a DSLR with its own T-ring.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAcquisition and Guiding Camera Integration\u003c\/h3\u003e\n\u003cp\u003eThe Lhires III uses two cameras. The acquisition camera records the spectrum on the camera port; the guiding camera (not supplied) goes on the C-mount port and watches the star on the mirror slit. The manual notes that most autoguiding software works, and that IRIS includes an algorithm for guiding on a mirror slit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrated Neon Lamp and Optional Modules\u003c\/h3\u003e\n\u003cp\u003eAccurate wavelength calibration is fundamental to spectroscopy. A neon calibration lamp is integrated in the spectrograph for reference emission lines. The neon lamp is powered with 12V. Shelyak offers optional grating modules for other resolutions, and the Lhires III Plus update kit adds an Argon-Neon lamp and a flat lamp.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFrom Raw Frames to Calibrated Spectra\u003c\/h3\u003e\n\u003cp\u003eAcquiring a spectrum is only the first step. The raw 2D images from your camera must be pre-processed (bias, dark, and flat-field correction), corrected for geometric distortions, and calibrated in wavelength. The Lhires III manual points to IRIS and VisualSpec for extracting and calibrating profiles. A large community shares examples and advice on the Spectro-L discussion list and the ARAS forum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMeasuring Doppler Shifts and Tracking Be Stars\u003c\/h3\u003e\n\u003cp\u003eThe Lhires III suits many projects. You can measure the rotation of Jupiter or Saturn by observing the tilt of solar absorption lines across the planet's disk. Other projects include spectroscopic binaries and Be stars, and tracking variable stars. Numerous scientific papers have been based on observations with a Lhires III, in collaboration between amateur and professional astronomers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Compact 1.7 kg, 250mm x 200mm x 83mm Build\u003c\/h3\u003e\n\u003cp\u003eThe Lhires III measures 250 mm x 200 mm x 83 mm and weighs 1.7 kg. It comes with the 2400 lines\/mm grating module, the interchangeable slit (15, 19, 23, 35 µm), the Schmidt-Cassegrain interface, the CCD adapter for 13 mm back focus cameras and an eyepiece holder for observing the Sun's spectrum by eye (eyepiece not supplied). The manual suggests a first session in daylight: point the slit at the sky, look at the solar spectrum and explore it with the micrometer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope works best with the Shelyak Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe ideal input is F\/10, which suits Schmidt-Cassegrain telescopes; the manual gives f\/8 to f\/12 as acceptable. Refractors and Newtonians slower than f\/8 can be used, and faster telescopes can use a Barlow lens if the back focus allows.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Lhires III Spectroscope to measure the rotation of Jupiter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The rotation of Jupiter or Saturn is an educational Doppler project. By orienting the slit along Jupiter's equator, you capture the spectrum from both the approaching (blue-shifted) and receding (red-shifted) limbs of the planet. This causes the solar absorption lines reflected from the planet's atmosphere to appear tilted, and the degree of tilt is a direct measurement of the rotational velocity.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to start autoguiding with the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need a C-mount guide camera (not supplied) and autoguiding software. The guide port is a dual-lens C-mount port (0.8x) with 17.5 mm back focus, and the mirror slit sends the field around the slit to it, so the star can be held in the slit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I attach my imaging camera to the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lhires III includes a standard adapter for ATIK cameras, which have a 13 mm mechanical back focus. For other cameras, Shelyak offers adapter sets for 17, 23, 25 and 34 mm back focus in its accessories catalogue.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Lhires III a good tool for studying Be stars like Gamma Cassiopeiae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Lhires III was designed for the observation of Be stars, and the manual shows a 2D spectrum of Gamma Cas. At R=18,000 you see the shape of the H-alpha emission profile and can follow its changes, a common amateur-professional collaboration topic.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I select a specific wavelength to observe with the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lhires III uses a manual micrometer screw to precisely rotate the internal grating. Turning the micrometer changes which part of the spectrum falls onto your camera sensor. This allows you to center any wavelength in the visible range (400 nm to 750 nm), giving you the flexibility to study any specific spectral feature of interest.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the different slit widths (15, 19, 23, 35 µm)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe slit width presents a fundamental trade-off between resolution and light throughput.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNarrower slits (15 µm, 19 µm):\u003c\/strong\u003e Provide the highest spectral resolution but allow less light to pass through. Use them when detail matters most.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWider slits (23 µm, 35 µm):\u003c\/strong\u003e Allow more light to reach the sensor, improving the signal-to-noise ratio for fainter targets, at the cost of resolution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe slit lets you give priority to resolution or brightness.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use a DSLR camera with the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The manual says the camera side is an M42 T-ring thread with enough back focus for a DSLR; the brand-specific T-ring is not supplied.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between the standard 2400 l\/mm grating and optional lower-resolution gratings?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe standard 2400 lines\/mm grating provides the maximum resolving power of R=18,000. Optional grating modules (such as 1800, 1200, 600, 300 and 150 l\/mm) lower the resolving power and make fainter objects accessible; examples are novae and bright comets. With a 200 mm f\/10 telescope (1 hour, S\/N 100), limiting magnitudes range from 5.0 with the 2400 grating to 9.2 with the 150 grating.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I calibrate my spectra taken with the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCalibration involves several steps. First, you must take calibration frames (bias, darks, flats). For wavelength calibration, you use the integrated Neon lamp to take a reference spectrum. Software such as IRIS or VisualSpec then uses the known wavelengths of the Neon emission lines to create a dispersion solution, which converts the pixel positions in your star's spectrum into an accurate wavelength scale in angstroms or nanometers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the Littrow design mean for the Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a Littrow spectrograph, the same lens collimates the light onto the grating and focuses the spectrum onto the camera. This removes the separate lenses of Czerny-Turner or Ebert designs, so the Lhires III is compact and economical to produce.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuide Port Specifications\u003c\/td\u003e\n\u003ctd\u003eDual-lens C-mount with 0.8x focal reducer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuide Camera Back Focus\u003c\/td\u003e\n\u003ctd\u003e17.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.7 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e250 mm x 200 mm x 83 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetector Compatibility\u003c\/td\u003e\n\u003ctd\u003eAccepts adaptor rings for CCD, CMOS, and DSLR cameras\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength range\u003c\/td\u003e\n\u003ctd\u003e400-750 nm (selectable, about 10 nm per setting)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003eSCT interface (2-inch SCT thread), optional 2-inch adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-side connection\u003c\/td\u003e\n\u003ctd\u003eCCD adapter for ATIK cameras (13 mm back focus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving power\u003c\/td\u003e\n\u003ctd\u003eR = 18,000 (2400 lines\/mm grating module, supplied)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003eF\/10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupplied slit\u003c\/td\u003e\n\u003ctd\u003einterchangeable 15, 19, 23, 35 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eLhires III spectroscope with 2400 lines\/mm grating module\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInterchangeable slit (15, 19, 23, 35 µm)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSchmidt-Cassegrain telescope interface\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCCD adapter (camera with 13 mm back focus)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eEyepiece holder (eyepiece not supplied)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Lhires_III_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Lhires III Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Lhires_III_User_Guide_Add-on_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Lhires III User Guide Add-on Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Lhires_III_Plus_Update_Kit_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Lhires III Plus Update Kit Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943030223133,"sku":"SHK-ES0002","price":7987.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Lhires-III-Spectroscope-1_23194ae6-2407-4edb-9048-0f5ef1136ff2.jpg?v=1789615906"},{"product_id":"shelyak-es0006","title":"Shelyak eShel III Complete System","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eResolving Power of R \u0026gt; 10,000\u003c\/li\u003e\n\u003cli\u003e390 nm to 700 nm Spectral Range\u003c\/li\u003e\n\u003cli\u003eCaptures Diffraction Orders 32 to 53\u003c\/li\u003e\n\u003cli\u003e50µm Target and 200µm Calibration Fibers\u003c\/li\u003e\n\u003cli\u003eIncludes F\/6 Fiber Injection \u0026amp; Guiding Unit (FIGU)\u003c\/li\u003e\n\u003cli\u003eThorium-Argon (ThAr) Calibration Module\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak eShel III Complete System\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak eShel is a complete, professional-level fiber-optic echelle \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e system that delivers a resolving power of R \u0026gt; 10,000 across a wide 390 nm to 700 nm spectral range. It captures diffraction orders 32 through 53 simultaneously, using 20-meter fibers, 50µm for the target and 200µm for calibration. Shelyak's example of a use that needs both range and resolution is the study of exoplanets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe eShel System: Professional Spectroscopy for the Advanced Amateur\u003c\/h3\u003e\n\u003cp\u003eThe eShel is a professional-level, multi-order, fiber-fed instrument for when you cannot choose between resolution and spectral range, as in exoplanet studies.\u003c\/p\u003e\n\u003cp\u003eDeveloped from Shelyak's experience with professional instruments like the Musicos and Narval spectroscopes, Shelyak developed the eShel. The complete system includes the spectrograph, the fiber injection and guiding unit, the calibration module and the optical fibers; the Demetra software is a free download.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEchelle Optical Design: Capturing Orders 32 to 53 Simultaneously\u003c\/h3\u003e\n\u003cp\u003eThe power of the eShel lies in its echelle optical design. An echelle grating is used at high diffraction orders, from 32 to 53. This spreads the starlight into a highly dispersed spectrum where many orders overlap. A second optical element, a cross-disperser prism, then separates these orders vertically, stacking them across the entire surface of the acquisition camera's sensor.\u003c\/p\u003e\n\u003cp\u003eThe resulting 2D echellogram can be read \"like a book,\" with the end of one spectral order found at the beginning of the next. This way the whole visible range is obtained over some twenty orders in a single exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eR \u0026gt; 10,000 Resolution Across a 390 nm to 700 nm Spectral Range\u003c\/h3\u003e\n\u003cp\u003eThe eShel delivers a resolving power of R \u0026gt; 10,000, which is the ability to distinguish fine details within the spectrum. It reaches more than 10,000 with an ATIK 460EX camera in 2x2 binning (camera not included), and the fiber feed makes radial velocity measurements more accurate.\u003c\/p\u003e\n\u003cp\u003eThe range covers about 390 nm to 700 nm, so lines such as H-beta, the sodium doublet and H-alpha are recorded in the same exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Fiber Feed: A 20m Link for Stability\u003c\/h3\u003e\n\u003cp\u003eA key feature of the eShel is its fiber-optic feed. The system uses a 20-meter optical fiber to transport light from the telescope to the spectrograph. This allows the spectrograph to be physically separated from the moving telescope and placed in a quiet, temperature-controlled room. Shelyak chose fibers to increase the accuracy of radial velocity measurements and for user comfort; the manual says the fiber link gives the best mechanical and thermal stability.\u003c\/p\u003e\n\u003cp\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eF\/6 Fiber Injection \u0026amp; Guiding Unit (FIGU): Precision Light Collection\u003c\/h3\u003e\n\u003cp\u003eThe F\/6 Fiber Injection \u0026amp; Guiding Unit (FIGU) is the critical interface between the telescope and the fiber. It contains a small mirror with a 50µm hole at its center. A \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguiding camera\u003c\/a\u003e views this mirror, allowing you to see the star field and precisely center your target on the hole. When the star is centered, its light passes through the hole and is injected into the 50µm object fiber.\u003c\/p\u003e\n\u003cp\u003eThe FIGU also takes the 200µm calibration fiber. A remote-controlled mirror switches from one source to the other, so the light from the calibration fiber feeds the 50µm object fiber and thus the spectrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eTelescope Integration: Matching Your Optics to the eShel System\u003c\/h3\u003e\n\u003cp\u003eThe eShel is designed to be adaptable to a variety of telescopes. The FIGU has a standard M42x0.75 T-mount thread and a backfocus of approximately 45mm. The included T-mount variable adapter simplifies connection, especially for \u003ca href=\"\/en-int\/collections\/schmidt-cassegrain-telescopes\"\u003eSchmidt-Cassegrain telescopes\u003c\/a\u003e. The supplied FIGU is the F\/6 version.\u003c\/p\u003e\n\u003cp\u003eFor telescopes with a different native focal ratio, such as a common f\/10 SCT, a \u003ca href=\"\/en-int\/collections\/flatteners-and-reducers\"\u003efocal reducer\u003c\/a\u003e (like a 0.63x reducer) with the variable \u003ca href=\"\/en-int\/collections\/imaging-adapters\"\u003eT-adapter\u003c\/a\u003e (using its 15mm extension tube) is what the manual recommends. An F\/9 FIGU and other F-ratios are available from Shelyak.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCamera Requirements: Sensor and Connection Specifications\u003c\/h3\u003e\n\u003cp\u003eThe eShel system does not include an acquisition camera. The spectrograph's objective is a Canon EOS lens, so a Canon DSLR can be fitted quickly, and astronomical cameras attach with the proper Canon EOS adapter. Camera mounting is critical: the backfocus range is limited (less than 9mm).\u003c\/p\u003e\n\u003cp\u003eThe manual describes a KAF1600 sensor (about 13x9mm, 9µm pixels) as well adapted: the size gives good overlap between orders and the pixel size suits the dispersion. It recommends QSI516ws or QSI532ws cameras with the BA0023 adapter, and Shelyak's example spectra were taken with an ATIK 460EX in 2x2 binning, a QSI516 and a Canon 40D.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCalibration Module: A Thorium-Argon Reference for Precision Work\u003c\/h3\u003e\n\u003cp\u003eAccurate wavelength calibration is fundamental to \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e. The eShel complete system includes a dedicated calibration module that provides the necessary light sources, controllable via the Demetra software. The primary source is a Thorium-Argon (ThAr) lamp, which produces a dense forest of narrow, well-known emission lines across the entire visible spectrum.\u003c\/p\u003e\n\u003cp\u003eThis ThAr spectrum is used as a precise \"ruler\" to determine the wavelength solution for every pixel on the sensor. The module also has a tungsten lamp, whose smooth spectrum is used to correct the blaze function, and LEDs used with the tungsten light for the flat that traces the geometry of the orders.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDemetra Software: From Automated Acquisition to Calibrated Spectrum\u003c\/h3\u003e\n\u003cp\u003eDemetra for eShel is free, runs under MS Windows and accompanies you from acquisition to data reduction. Demetra communicates with the calibration module to automate the acquisition of reference frames (bias, darks, flats, and ThAr spectra).\u003c\/p\u003e\n\u003cp\u003eIt also processes the complex echellograms automatically. The software identifies the orders, extracts the 1D spectrum from each one, applies the wavelength calibration using the ThAr reference, corrects for instrumental response, and merges the orders to produce a final, continuous, science-ready spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eScience with the eShel: From Exoplanets to Pulsating Stars\u003c\/h3\u003e\n\u003cp\u003eShelyak's examples show what the eShel records.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExoplanet Studies:\u003c\/strong\u003e Exoplanet studies are a case where you need both resolution and range, and the fiber feed is designed for radial velocity accuracy.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStellar Astrophysics:\u003c\/strong\u003e Study the atmospheres of Be stars like Delta Scorpii by monitoring emission lines such as H-alpha, or novae (example raw spectra include WR 140 and a nova in Delphinus).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulsating Stars:\u003c\/strong\u003e A time series of BW Vul (5-minute exposures over about 5 hours, around the sodium doublet) was taken with a 60cm telescope at Pic du Midi.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEmission-Line Stars:\u003c\/strong\u003e Shelyak's raw spectra include Beta Lyrae and P Cygni.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSystem Components and Getting Started on Your First Night\u003c\/h3\u003e\n\u003cp\u003eThe eShel is a complete system that includes all the core spectroscopic components. In the box, you will find the main spectrograph module, the F\/6 FIGU, the calibration module with ThAr lamp, a 20-meter 50µm object fiber, a 20-meter 200µm calibration fiber, and a T-mount variable adapter. You will provide the telescope, mount, acquisition camera, and guiding camera.\u003c\/p\u003e\n\u003cp\u003eInstallation should be performed during the daytime. The process involves assembling the components, connecting the fibers, and configuring the Demetra software with the specific parameters of your setup. The goal is to align the system and perform initial calibrations using the ThAr lamp so that you are ready to begin observations as soon as it gets dark. The installation and maintenance manual covers focusing the objective, mounting the camera and the processing parameters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main advantage of the eShel's echelle design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe echelle design resolves the traditional trade-off between resolution and spectral range. It uses multiple diffraction orders (32 to 53) to deliver both high resolution (R \u0026gt; 10,000) and a wide spectral range (390 nm to 700 nm) in a single exposure. Shelyak's example is the study of exoplanets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the eShel system use optical fibers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 20-meter optical fibers are essential for achieving the high stability required for precision spectroscopy, especially radial velocity measurements. By physically separating the spectrograph from the telescope, the instrument can be kept in a thermally stable environment, ideally a temperature-controlled room. Shelyak developed the eShel from its experience with the Musicos and Narval professional spectroscopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat components are included in the eShel complete system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe complete system includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe eShel spectroscope main module\u003c\/li\u003e\n\u003cli\u003eThe F\/6 Fiber Injection \u0026amp; Guiding Unit (FIGU)\u003c\/li\u003e\n\u003cli\u003eThe calibration module with a Thorium-Argon (ThAr) lamp\u003c\/li\u003e\n\u003cli\u003eA 20 m, 50µm optical fiber for the target\u003c\/li\u003e\n\u003cli\u003eA 20 m, 200µm optical fiber for calibration\u003c\/li\u003e\n\u003cli\u003eA T-mount variable adapter for telescope connection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou will need to provide your own telescope, mount, acquisition camera, and guiding camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of camera do I need for the eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eShel does not include an acquisition camera. The manual describes a 13x9mm sensor with 9µm pixels (KAF1600) as well adapted, and recommends QSI516ws or QSI532ws cameras with the BA0023 adapter. The objective is a Canon EOS lens, so a Canon DSLR fits directly; the camera backfocus range is under 9mm.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I match the eShel to my telescope's f\/10 focal ratio?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe included FIGU is optimized for an f\/6 beam. To use it with a typical f\/10 Schmidt-Cassegrain or similar telescope, the manual recommends a standard SCT 0.63x focal reducer and the variable T-adapter (with the 15mm extension tube), giving about f\/6.3.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Thorium-Argon (ThAr) lamp in the eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Thorium-Argon lamp is the calibration standard for the spectrograph. It produces many emission lines at known wavelengths. By taking a spectrum of the ThAr lamp, you create a precise \"ruler\" that allows the Demetra software to assign an accurate wavelength to every pixel on your camera sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Demetra software simplify using the eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eEchelle spectra are complex. The Demetra software automates the entire workflow. It controls the calibration module, manages image acquisition sequences, and performs the data reduction. It automatically identifies the 32 to 53 spectral orders, extracts the signal, applies the ThAr wavelength calibration, corrects for instrumental effects, and merges the orders into a single, continuous, calibrated spectrum ready for scientific analysis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat's the difference between the 50µm and 200µm fibers in the eShel system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e50µm fiber\u003c\/strong\u003e is for the astronomical target. It is the spectrograph's input, attached with an FC\/PC connector. The \u003cstrong\u003e200µm fiber\u003c\/strong\u003e is used exclusively to feed light from the internal calibration lamps (ThAr and Tungsten) to the FIGU. \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the eShel be used for exoplanet detection?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is one of its key applications. Exoplanet studies are an example use, and the fiber feed increases the accuracy of radial velocity measurements. No figure is given for the velocity precision.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the eShel to observe a pulsating star like BW Vulpeculae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn example series shows exactly this: raw 5-minute exposures of BW Vul over about 5 hours with a 60cm f\/3.5 telescope at Pic du Midi, around the sodium doublet. Because the eShel captures the entire 390 nm to 700 nm spectrum in each shot, you can analyze how different spectral lines change in shape, strength, and velocity simultaneously.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the eShel system portable for field observations?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSeparate the instrument from the telescope, if possible in a temperature-controlled room. The 20-meter fiber allows the spectrograph and calibration unit to be placed indoors or in a control room, away from the telescope. This setup is key to its precision. For temporary field use, you would need to ensure the spectrograph is kept in as stable a thermal environment as possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need prior experience with spectroscopy to use the eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eShel is a professional-level instrument. Demetra for eShel is easy to use and accompanies you from acquisition to data reduction, and the installation manual covers setup and maintenance step by step.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstrument Type\u003c\/td\u003e\n\u003ctd\u003eMulti-order Echelle Spectrograph\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving Power\u003c\/td\u003e\n\u003ctd\u003eR \u0026gt; 10,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Range\u003c\/td\u003e\n\u003ctd\u003e390 nm - 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiffraction Orders\u003c\/td\u003e\n\u003ctd\u003e32 to 53\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObject Fiber\u003c\/td\u003e\n\u003ctd\u003e50µm diameter, 20m length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration Fiber\u003c\/td\u003e\n\u003ctd\u003e200µm diameter, 20m length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Modules\u003c\/td\u003e\n\u003ctd\u003eF\/6 Fiber Injection \u0026amp; Guiding Unit (FIGU), Calibration Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration Source\u003c\/td\u003e\n\u003ctd\u003eThorium-Argon (ThAr) Lamp\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Software\u003c\/td\u003e\n\u003ctd\u003eDemetra (MS Windows)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 (T-mount) on the FIGU, via T-mount variable adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-Side Connection\u003c\/td\u003e\n\u003ctd\u003eCanon EOS lens on the spectrograph; camera fitted with a Canon EOS adapter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eeShel Spectroscope Main Module (PF0011)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCalibration Module with ThAr Lamp (PF0012)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eF\/6 Fiber Injection \u0026amp; Guiding Unit (FIGU, PF0008)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eT-mount variable adapter\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e50µm Target Optical Fiber, 20 m (PF0051)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e200µm Calibration Optical Fiber, 20 m (OP0024)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Installation_and_Maintenance_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Installation and Maintenance Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Calibration_Power_Supply_Addendum_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Calibration Power Supply Addendum Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Demetra_eShel_Software_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Demetra eShel Software Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943030452509,"sku":"SHK-ES0006","price":31049.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-eShel-III-complete-system-1_1cb6e98a-9887-4619-8862-7a6e9cc69114.jpg?v=1789615915"},{"product_id":"shelyak-es0012","title":"Shelyak Spox Module for Lhires III with 5m cable","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eRemote control for Lhires III calibration lamps\u003c\/li\u003e\n\u003cli\u003eManual push-button and automated PC control\u003c\/li\u003e\n\u003cli\u003eConnects to PC via USB for software\/ASCOM integration\u003c\/li\u003e\n\u003cli\u003eIncludes 5m cable for direct connection to spectrograph\u003c\/li\u003e\n\u003cli\u003eRequires external 12V DC power supply\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSpox Module for Lhires III with 5m cable\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Spox Module provides comprehensive remote control over the internal calibration lamps of your Lhires III \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e. This kit includes a 5m cable, allowing you to operate the flat-field and spectral calibration lamps from a comfortable distance. Control is managed either manually with onboard push-buttons or through a fully automated PC-based workflow via a standard USB connection, powered by a 12V DC supply.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRemote Calibration Control from 5 Meters Away\u003c\/h3\u003e\n\u003cp\u003eDesigned for both field and observatory use, the Spox module simplifies the critical process of spectrograph calibration. It gives you independent control over the internal tungsten lamp for flat fields and the Neon\/Argon lamp for spectral line calibration. This specific kit's included 5m cable ensures you can position the control box at your computer station or another convenient location, far from the telescope, eliminating any risk of vibration during calibration frames.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManual Operation:\u003c\/strong\u003e Simple push-buttons allow for quick, computer-free activation of either lamp, perfect for quick tests or fieldwork.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStatus Indicator:\u003c\/strong\u003e A red LED provides an immediate visual warning if one of the spectrograph's lamps is faulty or has failed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLhires III Specific:\u003c\/strong\u003e The included cable features a Tiny XLR connector for direct, secure attachment to the Lhires III spectrograph.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFull PC Integration via USB and ASCOM\u003c\/h3\u003e\n\u003cp\u003eFor automated observing runs, the Spox module connects to your Windows or Linux computer via USB. This enables integration with your existing acquisition software and scripts. Shelyak provides dedicated software for direct control, as well as an ASCOM driver for universal compatibility with popular automation platforms like N.I.N.A., SGP, or MaxIm DL. This allows you to program your entire session, including calibration sequences, to run unattended.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDirect Lhires III Connection and 12V Power\u003c\/h3\u003e\n\u003cp\u003eThis package is configured specifically for the Lhires III spectrograph, providing the necessary 5m cable for immediate connection. The system requires an external 12V DC \u003ca href=\"\/en-int\/collections\/power-accessories\"\u003epower supply\u003c\/a\u003e to operate, which is a standard voltage easily supplied by most observatory power systems or field batteries. The separation of control and power ensures clean, reliable signals for consistent calibration results night after night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat exactly does the Shelyak Spox Module control on my Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Spox Module independently controls the two internal calibration lamps inside the Lhires III spectrograph. You can switch on the \u003cstrong\u003etungsten lamp\u003c\/strong\u003e for taking flat-field frames or the \u003cstrong\u003eNeon\/Argon lamp\u003c\/strong\u003e for wavelength calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Spox Module for Lhires III without a computer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Spox has physical push-buttons on the housing that allow you to manually turn the flat and calibration lamps on and off. This is ideal for quick checks in the field or if you prefer a hands-on workflow without connecting to a PC.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat software do I need to control the Spox Module for Lhires III from my PC?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou have two main options for PC control via the USB connection. You can use Shelyak's dedicated control software, or you can use the provided \u003cstrong\u003eASCOM driver\u003c\/strong\u003e. The ASCOM driver allows the Spox to be controlled by most third-party astronomy automation software, integrating it seamlessly into your existing imaging workflow.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this Spox Module kit come with everything I need to connect to my Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit includes the Spox control box and the specific \u003cstrong\u003e5m cable\u003c\/strong\u003e needed to connect it to a Lhires III spectrograph. However, you will need to provide your own \u003cstrong\u003e12V DC power supply\u003c\/strong\u003e, as one is not included in the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have my Lhires III permanently mounted in an observatory 5 meters from my control PC. Is this Spox Module kit the right choice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this kit is perfectly suited for that scenario. The included 5m cable is specifically intended for setups where there is a significant distance between the telescope and the control computer, which is common in permanent observatory installations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Spox Module help get a better calibration spectrum of a Be star like Gamma Cassiopeiae with my Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor scientific-grade \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e of objects like the Be star Gamma Cassiopeiae (γ Cas), precise wavelength calibration is essential to measure the Doppler shift in its emission lines. The Spox Module allows you to take a Neon\/Argon calibration frame immediately before or after your science exposure without touching the telescope. This automated, remote process ensures your calibration is as accurate as possible, leading to more reliable scientific measurements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Spectroscope\u003c\/td\u003e\n\u003ctd\u003eLhires III (shipped since 2016, or fitted with the calibration upgrade kit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlso Compatible With\u003c\/td\u003e\n\u003ctd\u003eAlpy 600, LISA (add the Alpy\/LISA adapter cable, SE0183), basic non-motorized UVEX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Cable Length\u003c\/td\u003e\n\u003ctd\u003e5m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectrograph Connector\u003c\/td\u003e\n\u003ctd\u003eTiny XLR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePC Interface\u003c\/td\u003e\n\u003ctd\u003eUSB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware Control\u003c\/td\u003e\n\u003ctd\u003eDedicated Application (Windows\/Linux) \u0026amp; ASCOM Driver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual Control\u003c\/td\u003e\n\u003ctd\u003eOnboard push-buttons for Flat \u0026amp; Calibration lamps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput power\u003c\/td\u003e\n\u003ctd\u003e12V DC, 1 A min.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e5.5 x 2.5 mm DC socket, centre positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e110 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSPOX control box\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eUSB cable (1.8 m per the SPOX manual; shelyak.com says 2 m)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e4-pin Tiny XLR cable, 5 m\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_SPOX_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak SPOX Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943030649117,"sku":"SHK-ES0012","price":607.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Spox-Module-for-Lhires-III-with-5m-cable-1_4d1ce810-95de-419b-83ad-7a08df5a3bfc.jpg?v=1789615923"},{"product_id":"shelyak-es0013","title":"Shelyak Spox Module for Lhires III with 0.8m cable","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eRemote calibration control for Shelyak Lhires III spectrographs\u003c\/li\u003e\n\u003cli\u003eManages both Tungsten (flat) and Neon\/Argon (calibration) lamps\u003c\/li\u003e\n\u003cli\u003eIncluded 0.8m cable with Tiny XLR 4-pin connector for direct connection\u003c\/li\u003e\n\u003cli\u003eDual control via manual push-buttons or USB computer connection\u003c\/li\u003e\n\u003cli\u003eASCOM compatible for integration with automation software\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSpox Module for Lhires III with 0.8m cable\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Spox Module for Lhires III streamlines your spectroscopic workflow by giving you remote command over your calibration lamps, connecting directly via the included 0.8m cable. This single unit manages both the tungsten flat lamp and the Neon\/Argon calibration lamp, eliminating vibration and the need to physically access the instrument during an imaging session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e2-Lamp Remote Control for Your Lhires III\u003c\/h3\u003e\n\u003cp\u003eThe Spox module is the ideal accessory for automating your Lhires III data acquisition. It independently controls the two essential lamps required for professional-grade spectra: the tungsten lamp for flat-field frames and the Neon\/Argon lamp for precise wavelength calibration. A red LED on the unit provides an immediate visual warning if one of the \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e's lamps is faulty, saving you from failed calibration runs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e2-Mode Control: Manual Push-Button or Full ASCOM Integration\u003c\/h3\u003e\n\u003cp\u003eThe Spox is designed for flexibility, whether you are in the field or in a permanent observatory. For quick, computer-free operation, you can trigger each lamp using dedicated push-buttons directly on the box. For automated sequences, connect the Spox to your Windows or Linux computer via USB to use Shelyak's dedicated software or, more importantly, the ASCOM driver to integrate lamp control directly into your preferred imaging software.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e0.8m Cable for Direct Lhires III Connection\u003c\/h3\u003e\n\u003cp\u003eThis kit is specifically configured for the Lhires III spectrograph. It includes a 0.8m cable terminating in a Tiny XLR 4-pin connector for a secure, direct connection to the spectrograph's calibration module. A USB cable for computer control is also supplied. Please note that the Spox module requires an external 12V \u003ca href=\"\/en-int\/collections\/power-accessories\"\u003epower supply\u003c\/a\u003e, which is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I power the Shelyak Spox Module for Lhires III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Spox Module requires a standard \u003cstrong\u003e12V DC power supply\u003c\/strong\u003e to operate. This power supply is not included with the module and must be sourced separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Spox Module for Lhires III with my automated imaging software like N.I.N.A. or SGP?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Spox Module includes an \u003cstrong\u003eASCOM driver\u003c\/strong\u003e, which allows it to be controlled by any ASCOM-compliant automation software. This enables you to program the activation of your flat and calibration lamps as part of a fully automated imaging sequence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do the buttons on the Spox Module do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe push-buttons provide simple manual control without needing a computer. One button controls the \u003cstrong\u003eTungsten lamp\u003c\/strong\u003e for taking flat frames, and the other controls the \u003cstrong\u003eNeon\/Argon lamp\u003c\/strong\u003e for spectral calibration frames.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this Spox Module kit work with a Shelyak Alpy 600 or LISA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, not directly. While the Spox box itself is compatible with the \u003ca href=\"\/en-int\/products\/shelyak-alpy-600-spectroscope\"\u003eAlpy 600\u003c\/a\u003e and LISA spectrographs, this specific kit includes a cable with a Tiny XLR connector designed only for the \u003cstrong\u003eLhires III\u003c\/strong\u003e. To use it with an Alpy 600 or LISA, add the Alpy\/LISA adapter cable (SE0183), which plugs onto the end of this cable.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm capturing the spectrum of Vega (Alpha Lyrae) with my Lhires III. How does the Spox help?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAfter capturing the spectrum of Vega, you can use the Spox module to immediately take calibration frames without touching the telescope and risking a shift in the setup. You would remotely trigger the Neon\/Argon lamp to record its emission lines, which you'll use to accurately calibrate the wavelength of your star's spectrum in software.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy Lhires III is on a 10\" SCT in an observatory. Is the 0.8m cable long enough?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e0.8m (2.6 ft) cable\u003c\/strong\u003e is designed for setups where the Spox module can be mounted very close to the spectrograph itself. For a larger observatory setup where you need more distance between the control box and the instrument, Shelyak also offers a 5m cable option, which can be ordered separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eLHIRES III (shipped since 2016, or fitted with the calibration upgrade kit); the SPOX box also works with Alpy 600 and LISA using the Alpy\/LISA adapter cable, and with the basic non-motorized UVEX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Cable Length\u003c\/td\u003e\n\u003ctd\u003e0.8m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eTiny XLR 4-pin (for Lhires III)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Interface\u003c\/td\u003e\n\u003ctd\u003eManual Push-Button, USB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware Support\u003c\/td\u003e\n\u003ctd\u003eASCOM, Dedicated Application (Windows\/Linux)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput power\u003c\/td\u003e\n\u003ctd\u003e12V DC, 1 A min.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e5.5 x 2.5 mm DC socket, centre positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e110 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSPOX control box\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eUSB cable (1.8 m per the SPOX manual; shelyak.com says 2 m)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e4-pin Tiny XLR cable, 0.8 m\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_SPOX_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak SPOX Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943030911261,"sku":"SHK-ES0013","price":607.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Spox-Module-for-Lhires-III-with-5m-cable-1_1df2600f-f2bd-4129-aed8-513b1d3b3574.jpg?v=1789615931"},{"product_id":"shelyak-es0014","title":"Shelyak Spox Module for Alpy\/LISA with 5m cable","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAutomates calibration lamp control\u003c\/li\u003e\n\u003cli\u003eCompatible with Alpy 600, LISA, and LHIRES III\u003c\/li\u003e\n\u003cli\u003eIncludes 5m spectrograph connection cable\u003c\/li\u003e\n\u003cli\u003eManual push-button and remote PC\/ASCOM control\u003c\/li\u003e\n\u003cli\u003eRequires 12V DC power supply (not included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSpox Module for Alpy\/LISA with 5m cable\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Spox Module automates calibration for \u003ca href=\"\/en-int\/products\/shelyak-alpy-600-spectroscope\"\u003eAlpy 600\u003c\/a\u003e, LISA, and LHIRES III spectrographs, connecting to your instrument via the included 5m cable. This module offers an alternative to the shorter 0.8m cable, providing essential flexibility for permanent observatory setups where equipment is positioned away from the primary controller.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e12V Remote Calibration for Alpy, LISA \u0026amp; LHIRES III\u003c\/h3\u003e\n\u003cp\u003eThe Spox module eliminates the need to manually access your spectrograph to activate the tungsten flat-field lamp or the Neon\/Argon spectral calibration lamp (in the calibration module of the Alpy 600, LISA or UVEX, or built into the LHIRES III). It streamlines your workflow, enabling fully remote and automated data acquisition sequences for serious scientific work. This module is compatible with the Alpy 600, LISA, LHIRES III, and the basic, non-motorized UVEX spectrographs, requiring a standard 12V \u003ca href=\"\/en-int\/collections\/power-accessories\"\u003epower supply\u003c\/a\u003e for operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eManual and ASCOM Control with a 5m Cable\u003c\/h3\u003e\n\u003cp\u003eYou can operate the Spox module in two ways: directly via push-buttons on the unit for field use, or remotely from a computer using the included USB cable. For remote operation, Shelyak provides dedicated software for Windows and Linux, as well as an ASCOM driver for seamless integration with popular automation software. This kit's 5m cable provides ample length for routing connections cleanly within an observatory, while a red LED on the box warns if a lamp is faulty (this lamp failure detection is not available with the LISA calibration module).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat spectrographs is the Spox Module compatible with?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Shelyak Spox Module is designed to control the flat and calibration lamps of the \u003cstrong\u003eAlpy 600\u003c\/strong\u003e, \u003cstrong\u003eLISA\u003c\/strong\u003e, \u003cstrong\u003eLHIRES III\u003c\/strong\u003e, and the basic, non-motorized \u003cstrong\u003eUVEX\u003c\/strong\u003e spectrographs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I control the Spox Module? Can I automate it?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Spox Module offers two control methods. You can operate it manually using the push-buttons on the control box itself, or you can connect it to a computer via USB for remote control. For automation, an \u003cstrong\u003eASCOM driver\u003c\/strong\u003e is available, allowing it to be integrated into scripted imaging and \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e sessions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is included in this Spox Module 5m kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis specific kit includes the Spox control box, a USB cable for computer connection, the \u003cstrong\u003e5m cable\u003c\/strong\u003e for connecting to your spectrograph, and the necessary adapter for use with either an Alpy 600 or LISA spectrograph. A 12V power supply is required but not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Spox Module require an external power supply?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Spox Module requires a \u003cstrong\u003e12V DC power supply\u003c\/strong\u003e to operate the flat and calibration lamps. The power supply is not included with the module.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a LHIRES III in a permanent observatory setup. Is the Spox Module with the 5m cable the right choice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The \u003cstrong\u003e5m cable\u003c\/strong\u003e included in this kit is ideal for permanent observatory installations, providing ample length to route the connection from the telescope-mounted LHIRES III back to a control \u003ca href=\"\/en-int\/collections\/tripods-and-piers\"\u003epier\u003c\/a\u003e or computer station without creating cable strain or tangles. The shorter 0.8m option is better suited for portable field setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm running an automated session on supernova SN 2023ixf with my LISA spectrograph. Can the Spox Module automatically take my calibration frames?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. When controlled via its ASCOM driver, the Spox Module can be scripted by your automation software. This allows your system to automatically activate the flat and calibration lamps and capture the necessary frames at any point during your session on SN 2023ixf without manual intervention.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Spectrographs\u003c\/td\u003e\n\u003ctd\u003eAlpy 600, LISA, LHIRES III (shipped since 2016, or fitted with the calibration upgrade kit), UVEX (non-motorized)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Cable Length\u003c\/td\u003e\n\u003ctd\u003e5m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlternative Cable Lengths\u003c\/td\u003e\n\u003ctd\u003e0.8m, Without Cable (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePC Connectivity\u003c\/td\u003e\n\u003ctd\u003eUSB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware Control\u003c\/td\u003e\n\u003ctd\u003eDedicated App \/ ASCOM Driver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput power\u003c\/td\u003e\n\u003ctd\u003e12V DC, 1 A min.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e5.5 x 2.5 mm DC socket, centre positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e110 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSpox Control Box\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eUSB Cable\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e5m Spectrograph Connection Cable\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAdapter for Alpy 600 \/ LISA\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_SPOX_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak SPOX Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943031173405,"sku":"SHK-ES0014","price":695.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Spox-Module-for-Lhires-III-with-5m-cable-1_8d22e28a-e436-4ce6-936b-bd53d18fcf64.jpg?v=1789615938"},{"product_id":"shelyak-es0015","title":"Shelyak Spox Module for Alpy\/LISA with 0.8m cable","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAutomates calibration lamp control for Alpy 600, LISA, and LHIRES III spectrographs\u003c\/li\u003e\n\u003cli\u003eIncludes 0.8m cable for connecting the module to the spectrograph\u003c\/li\u003e\n\u003cli\u003eDual control modes: manual push-buttons or computer control via USB\u003c\/li\u003e\n\u003cli\u003eASCOM driver for integration into automated imaging sequences\u003c\/li\u003e\n\u003cli\u003eStatus LED indicates lamp faults (not with the LISA calibration module)\u003c\/li\u003e\n\u003cli\u003eRequires external DC power supply (not included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eSpox Module for Alpy\/LISA with 0.8m cable\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak SPOX module automates calibration for \u003ca href=\"\/en-int\/products\/shelyak-alpy-600-spectroscope\"\u003eAlpy 600\u003c\/a\u003e, LISA, and LHIRES III \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrographs\u003c\/a\u003e using the included 0.8m connection cable. Control your tungsten flat and Neon\/Argon calibration lamps with either manual push-buttons or full computer control via USB and ASCOM, with an option for a longer 5m cable for remote setups.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAutomated Calibration for Alpy 600, LISA \u0026amp; LHIRES III Spectrographs\u003c\/h3\u003e\n\u003cp\u003eThe SPOX module eliminates the need to manually switch on your calibration lamps, streamlining a critical step in acquiring scientific-grade spectra. It provides dedicated control over both the tungsten lamp for flat frames and the Neon\/Argon lamp for spectral calibration. This allows for repeatable, consistent calibration sequences, which are essential for precise data reduction. A red LED on the unit provides an immediate visual warning if a lamp is faulty (this lamp failure detection is not available with the LISA calibration module).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDual Control: Manual Push-Button and USB\/ASCOM Operation\u003c\/h3\u003e\n\u003cp\u003eFlexibility is central to the SPOX design. For fieldwork or quick setup verification, you can operate the lamps directly using the push-buttons on the module, no computer required. For permanent or remote observatories, connect the SPOX to your Windows or Linux PC via USB. You can then use Shelyak's dedicated software or, for full automation, integrate it into your existing imaging software using the provided ASCOM driver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e0.8m Spectrograph Cable and USB Connectivity\u003c\/h3\u003e\n\u003cp\u003eThis kit includes the 0.8m cable required to connect the SPOX module to your spectrograph. The cable is terminated with a Tiny XLR connector for a direct, secure fit with the LHIRES III. If you are using an ALPY 600 or LISA spectrograph, an included adapter ensures full compatibility. The module requires an external DC \u003ca href=\"\/en-int\/collections\/power-accessories\"\u003epower supply\u003c\/a\u003e, which is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the Shelyak SPOX module control on my Alpy 600?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SPOX module remotely controls the two internal lamps in the Alpy 600's calibration module: the \u003cstrong\u003etungsten lamp\u003c\/strong\u003e for taking flat-field frames and the \u003cstrong\u003eNeon\/Argon lamp\u003c\/strong\u003e for wavelength calibration. This allows you to acquire essential calibration data without physically touching your telescope setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a computer to use the SPOX module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, a computer is not strictly necessary. The SPOX module features \u003cstrong\u003emanual push-buttons\u003c\/strong\u003e that allow you to turn the flat and calibration lamps on and off directly from the box. This is ideal for portable setups or quick visual checks. For automation and remote control, you would connect it to a computer via USB.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Shelyak SPOX module compatible with my LHIRES III spectrograph out of the box?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. If your LHIRES III was shipped since 2016 or has the calibration \u003ca href=\"\/en-int\/collections\/knobs-handles-and-upgrade-kits\"\u003eupgrade kit\u003c\/a\u003e (two buttons for flat and calibration lamp), the included 0.8m cable's Tiny XLR connector plugs directly into it. For ALPY 600 and LISA spectrographs, a small adapter is included in the kit to ensure proper connection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat software do I need to control the SPOX module from my PC?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou can use Shelyak's dedicated control software, available from their website. For more advanced users, Shelyak also provides an \u003cstrong\u003eASCOM driver\u003c\/strong\u003e. The ASCOM driver allows you to integrate the SPOX module into popular automation software like N.I.N.A. or Sequence Generator Pro, making it part of a fully automated data acquisition sequence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the SPOX module simplify taking calibration frames for a star like Vega (Alpha Lyrae) with my LISA spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAfter observing a bright star like Vega, you need to record calibration frames (flats and wavelength references) with the exact same focus and instrument orientation. The SPOX module lets you immediately trigger the Neon\/Argon and tungsten lamps remotely via your computer. This ensures your calibration data perfectly matches the conditions of your science observation, which is critical for accurate spectral analysis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm setting up a remote observatory with an Alpy 600 on an f\/8 refractor. Can the SPOX module be fully automated?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the SPOX module is ideal for this scenario. By connecting it to your observatory computer via USB and using the \u003cstrong\u003eASCOM driver\u003c\/strong\u003e, you can script its operation. Your automation software can be programmed to turn on the lamps, acquire the necessary calibration frames, and turn them off at the end of an imaging session without any manual intervention.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Spectrographs\u003c\/td\u003e\n\u003ctd\u003eAlpy 600, LISA, LHIRES III (shipped since 2016, or fitted with the calibration upgrade kit), basic non-motorized UVEX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Spectrograph Cable\u003c\/td\u003e\n\u003ctd\u003e0.8m length with Tiny XLR connector\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComputer Interface\u003c\/td\u003e\n\u003ctd\u003eUSB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware Control\u003c\/td\u003e\n\u003ctd\u003eDedicated Application (Windows\/Linux), ASCOM Driver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManual Control\u003c\/td\u003e\n\u003ctd\u003eOn-board push-buttons\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicators\u003c\/td\u003e\n\u003ctd\u003eRed LED for lamp fault detection (not available with the LISA calibration module)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput power\u003c\/td\u003e\n\u003ctd\u003e12V DC, 1 A min.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e5.5 x 2.5 mm DC socket, centre positive\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e110 g\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable Length\u003c\/td\u003e\n\u003ctd\u003e0.8 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSPOX control box\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eUSB cable (1.8 m per the SPOX manual; shelyak.com says 2 m)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e4-pin Tiny XLR cable, 0.8 m\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAlpy \u0026amp; LISA adapter cable\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_SPOX_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak SPOX Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943031501085,"sku":"SHK-ES0015","price":695.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Spox-Module-for-Lhires-III-with-5m-cable-1_6037a903-7e7b-4f9b-b91b-4f83746d1810.jpg?v=1789615947"},{"product_id":"shelyak-es0021","title":"Shelyak UVEX Spectroscope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSpectral range from 350 nm (UV) to 1 µm (IR)\u003c\/li\u003e\n\u003cli\u003eResolving power of R=1710 with included 600 l\/mm grating\u003c\/li\u003e\n\u003cli\u003eMulti-position slit with 25µm, 50µm, 100µm, and 300µm options\u003c\/li\u003e\n\u003cli\u003eOptimized for F\/8 telescopes and usable down to F\/5\u003c\/li\u003e\n\u003cli\u003e1.2 kg body; female M42x0.75 thread on the guiding module adapter\u003c\/li\u003e\n\u003cli\u003eCrossed Czerny-Turner design with two spherical mirrors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak UVEX Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak UVEX Spectroscope is, in Shelyak's words, the most versatile instrument in its range, covering a spectral range from 350 nm in the ultraviolet to 1µm in the near-infrared. Its crossed Czerny-Turner mirror design delivers a resolving power of R=1710 at 650 nm with the included 600 l\/mm grating. The instrument features a multi-position slit wheel with apertures from a 25µm slit to a 3mm slitless hole, all housed in a compact 1.2 kg body optimized for F\/8 telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Shelyak UVEX: Shelyak's Most Versatile Spectroscope\u003c\/h3\u003e\n\u003cp\u003eThe UVEX is achromatic by design, able to explore far into the ultraviolet and infrared, at the limits of what today's cameras can achieve. Interchangeable gratings give different resolutions, the slit is easy to change, and with its motorization module it can be operated remotely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCrossed Czerny-Turner Optics: Achromatic from 350 nm to 1 µm\u003c\/h3\u003e\n\u003cp\u003eThe UVEX is a crossed Czerny-Turner spectroscope with two spherical mirrors (M1, the \u003ca href=\"\/en-int\/collections\/collimation-tools\"\u003ecollimator\u003c\/a\u003e, and M2, the objective) and the \u003ca href=\"\/en-int\/collections\/gratings-and-slits\"\u003ediffraction grating\u003c\/a\u003e. The two mirrors are what let the UVEX go far into the blue (UV) and red (IR), since a mirror is purely achromatic. The design has a natural astigmatism that widens the spectrum, so a cylindrical lens at the end of the light path concentrates more light on each pixel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eR=1710 Resolving Power with the 600 l\/mm Grating\u003c\/h3\u003e\n\u003cp\u003eThe UVEX ships with a 600 lines\/mm grating blazed at 500 nm, which provides a resolving power (R) of 1710 at a wavelength of 650 nm.  The grating is interchangeable: optional 150, 300, 1200 and 1800 l\/mm gratings change the resolution. Shelyak's resolution figures are theoretical, with the standard 23µm slit; a wider slit reduces the resolution.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrating Adjustment:\u003c\/strong\u003e An index sets the central wavelength on the sensor, and a vernier (one for each type of grating) positions the grating precisely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking:\u003c\/strong\u003e A grating locker knob holds the selected angle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e6-Position Slit: From 25µm to the 3mm Hole\u003c\/h3\u003e\n\u003cp\u003eThe instrument includes a multi-position slit wheel that gives you immediate control over the trade-off between spectral resolution and light throughput. A narrower slit gives more resolution, a wider one lets in more light. The slit has six positions, changed with the supplied Phillips screwdriver.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlit Options:\u003c\/strong\u003e The wheel provides 25µm, 50µm, 100µm, and 300µm slits for scientific observation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTargeting Aids:\u003c\/strong\u003e A 25µm hole is mainly for test purposes, and the 3mm hole is the slitless position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuiding Slit:\u003c\/strong\u003e When used with the optional guiding module, the slit must be replaced by the mirror slit that comes with the guiding module. Other slits are optional, and Alpy slits fit the UVEX.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptimized for F\/8 Telescopes up to 400mm\u003c\/h3\u003e\n\u003cp\u003eThe optimum telescope focal ratio is F\/8, and the UVEX is particularly suitable for \u003ca href=\"\/en-int\/collections\/ritchey-chretien-and-dall-kirkham\"\u003eRitchey-Chretien\u003c\/a\u003e (RC) telescopes up to 400mm in diameter at F\/8. You can go up to F\/5 without vignetting, at the cost of a slight degradation in quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eM42x0.75 Connections and 13mm Camera Back Focus\u003c\/h3\u003e\n\u003cp\u003eThe UVEX features standard connections for easy integration. The telescope-side connection is a female M42x0.75 T-thread, located on the guiding module adapter. The guiding module adapter is shipped with the UVEX; the guiding and calibration modules themselves are sold separately. The main camera attaches with a special adapter. A critical requirement of the compact optical design is that the acquisition camera must have a short back focus of 13mm or less to achieve a properly focused spectrum.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera Adapters:\u003c\/strong\u003e The UVEX ships with an adapter for ZWO-brand cameras. Optional adapters for QHY and ATIK cameras are also available.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectrum Focus:\u003c\/strong\u003e A multi-turn knob adjusts the focus of the internal M2 mirror; its counter-button value can be recorded for later use.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSensor and Back Focus Requirements for UVEX\u003c\/h3\u003e\n\u003cp\u003eThe spectrum on the sensor is about 20mm long, and the sensor's longest dimension goes in the optical plane of the instrument. The \u003ca href=\"\/en-int\/products\/zwo-asi533mm-pro-mono\"\u003eZWO ASI533MM Pro\u003c\/a\u003e camera is recommended with the UVEX; the supplied adapter ring is for ZWO cameras, and the camera's backfocus must be 13mm maximum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Optional Guiding and Calibration Modules\u003c\/h3\u003e\n\u003cp\u003eThe UVEX uses the Alpy \u0026amp; UVEX guiding and calibration modules, bought separately. The calibration module provides calibration and flat spectra; because of its fast beam, calibration lines look better at the blue end than at the red end, with no effect on calibration precision. Get the UVEX working on a table first, then add the modules.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDemetra Software: From Acquisition to Calibrated Spectra\u003c\/h3\u003e\n\u003cp\u003eDemetra-UVEX, the free version of Demetra dedicated to the UVEX, is recommended for tuning, acquisition and data reduction. Demetra manages observing sessions, controls the camera through ASCOM and guides you through flats, calibration frames and reduction to a calibrated spectrum. Any other software can also be used, since the UVEX creates standard images; PHD2 can be used for guiding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eObserving Projects\u003c\/h3\u003e\n\u003cp\u003eWith R=1710 at 650 nm and coverage from the near UV to the near IR, the UVEX suits spectral classification, emission-line stars and variable star monitoring, and the interchangeable gratings let you move between wide coverage and more resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 1.2 kg Instrument in a 3.2 kg Field-Ready Case\u003c\/h3\u003e\n\u003cp\u003eThe UVEX weighs 1.2 kg without camera, and 3.2 kg with its carrying case. The shockproof case has pre-cut slots for the \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e with its camera and for accessories (additional gratings, order filter, tools). A Kodak \u003ca href=\"\/en-int\/collections\/tripods-and-piers\"\u003etripod\u003c\/a\u003e thread lets you use it in the laboratory.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat type of telescope is best for the Shelyak UVEX Spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UVEX is optimized for an F\/8 focal ratio, and it is particularly suitable for Ritchey-Chretien (RC) telescopes up to 400mm in diameter (F\/8). It can go up to F\/5 without vignetting, at the cost of a slight degradation in quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the UVEX achieve its wide 350 nm to 1µm spectral range?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UVEX's main optics are two spherical mirrors in a crossed Czerny-Turner layout. This is what lets it go far into the blue (UV) and red (IR), since a mirror is purely achromatic.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the UVEX to study the Balmer series in a star like Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Vega is a hot, A-type star with very prominent hydrogen absorption lines (the Balmer series). The UVEX's spectral range, extending down to 350 nm, covers the Balmer series from H-alpha (656.3 nm) down into the near UV; with the 600 l\/mm grating, the part recorded at one time depends on the grating angle and your sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow can I use the UVEX to analyze an emission-line star like Gamma Cassiopeiae (γ Cas)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eGamma Cas is a classic Be star, characterized by strong emission lines (especially H-alpha) from a circumstellar disk. Using the UVEX with its 600 l\/mm grating, you can center the grating on 656.3 nm to record the H-alpha emission line and follow how its strength changes over time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the different slit sizes on the Shelyak UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe slit width determines the balance between spectral resolution and light throughput.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNarrow slits (25µm, 50µm):\u003c\/strong\u003e Provide higher spectral resolution, allowing you to resolve finer details and separate closely spaced lines. \u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWider slits (100µm, 300µm):\u003c\/strong\u003e Allow more light to enter the spectroscope, at the cost of lower resolution.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHoles (25µm, 3mm):\u003c\/strong\u003e The 3mm hole is the slitless position, and the 25µm hole is mainly for test purposes.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the Shelyak UVEX require a camera with a back focus of 13mm or less?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe compact optical layout puts a strong constraint on the camera backfocus: it must be 13mm maximum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I change the grating in the Shelyak UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is a simple operation: loosen and remove the black grating cap, gently remove the grating holder and put it in its box, then install the new grating (its orientation is given by the flat surface of the holder). Each grating comes with its own vernier, which you change too. The grating surface is very fragile.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs software included with the Shelyak UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, Shelyak provides the \u003cstrong\u003eDemetra software\u003c\/strong\u003e as a free download from their website. Demetra-UVEX, the version dedicated to the UVEX, is recommended. It handles camera control (via ASCOM), observing sessions and data reduction to a calibrated spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat do I need to autoguide my observations with the UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need the optional guiding module and a \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguide camera\u003c\/a\u003e. The UVEX slit is replaced by the mirror slit that comes with the guiding module; the supplied guiding module adapter attaches the UVEX to it. The manual mentions PHD2 as guiding software.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the R=1710 resolving power of the UVEX let me see?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eR=1710 at 650 nm means features about 0.4 nm apart can be separated there. That is enough to see the main absorption lines and bands of different stellar types and the H-alpha emission of Be stars; the 0.6 nm sodium D doublet sits close to that limit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I avoid order overlap when observing in the near-infrared with the UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbove about 750 nm, the second order of blue light can overlap the first order (400 nm at second order falls with 800 nm at first order). Shelyak offers an order filter that cuts all light below 500 nm; the UVEX holds it right after the slit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I operate the Shelyak UVEX remotely?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. With the optional UVEX motors module, the grating angle and focus can be controlled remotely, along with the calibration module.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Range\u003c\/td\u003e\n\u003ctd\u003e350 nm to 1µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit Options\u003c\/td\u003e\n\u003ctd\u003eMulti-position: 25µm, 50µm, 100µm, 300µm, 25µm hole, 3mm hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal Telescope F\/D\u003c\/td\u003e\n\u003ctd\u003eF\/8 (usable to F\/5 with minor quality degradation)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e145 x 140 x 120 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (Spectroscope only)\u003c\/td\u003e\n\u003ctd\u003e1.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (with carrying case)\u003c\/td\u003e\n\u003ctd\u003e3.2 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving power (R)\u003c\/td\u003e\n\u003ctd\u003eR = 1710 @ 650 nm (600 l\/mm grating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 Female (guiding module adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptical design\u003c\/td\u003e\n\u003ctd\u003eCrossed Czerny-Turner\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupplied grating\u003c\/td\u003e\n\u003ctd\u003e600 gr\/mm blazed at 500 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eUVEX spectroscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e600 gr\/mm grating blazed at 500 nm (installed)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eRigid shockproof carrying case\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTool set\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBag of spare screws\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eScrews for fixing the autoguiding module\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 4\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAdapter ring for ZWO cameras\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePlastic vernier for the 600 gr\/mm grating\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_UVEX_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak UVEX Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Demetra_Software_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Demetra Software Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943031795997,"sku":"SHK-ES0021","price":8439.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-UVEX-Spectroscope-1_c215e6c3-6f26-4c18-9eed-3ea279d077a9.jpg?v=1789615956"},{"product_id":"shelyak-es0033","title":"Shelyak Optical kit for Star'Ex LR spectroscope - IR complement","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eExtends Star'Ex LR spectroscope range to 650 nm – 1000 nm\u003c\/li\u003e\n\u003cli\u003eAchieves a spectral resolution of R=650 with a 23-micron slit\u003c\/li\u003e\n\u003cli\u003eDesigned for DIY 3D-printed spectroscope projects\u003c\/li\u003e\n\u003cli\u003eIncludes an 80mm focal length objective lens optimized for near infrared\u003c\/li\u003e\n\u003cli\u003eMaintains a 1:1 internal reduction ratio for simple imaging\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eOptical kit for Star'Ex LR spectroscope - IR complement\u003c\/h2\u003e\n\u003cp\u003eThis optical kit provides the essential components to modify a Star'Ex Low Resolution (LR) \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e for near-infrared observation, extending its range from the visible spectrum out to 1000 nm. With a typical resolution of R=650 using a 23-micron slit, this kit enables the study of faint object spectra with a DIY, 3D-printable instrument. The design is built around an 80mm focal length \u003ca href=\"\/en-int\/collections\/collimation-tools\"\u003ecollimator\u003c\/a\u003e and objective, ensuring a direct 1:1 imaging ratio onto your sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eExtend Your Star'Ex LR into the Infrared up to 1000nm\u003c\/h3\u003e\n\u003cp\u003eThis kit is specifically designed as the infrared (IR) complement for the Star'Ex LR project. While the base Star'Ex operates in the visible range from 400 nm to 700 nm, these optics push your instrument's capabilities into the near-IR, covering a wavelength range of 650 nm to 1000 nm. This allows you to analyze spectral features not visible to the human eye, such as those in carbon stars and other cool stellar classes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAchieve R=650 Resolution with an 80mm Optical Design\u003c\/h3\u003e\n\u003cp\u003eThe system is engineered to deliver a spectral resolution of R=650 at 650 nm when paired with a 23-micron slit. This level of detail is ideal for classifying stellar types and identifying major emission and absorption lines in faint targets like nebulae and galaxies. The optical train uses an 80mm focal length for both the collimator and objective lenses, a design choice that simplifies the system and provides a clean, direct image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDIY Spectroscope: A 3D-Printed Project with 1:1 Optics\u003c\/h3\u003e\n\u003cp\u003eThis is an optical component kit for a do-it-yourself project, not a complete spectroscope. You will need to provide the 3D-printed housing and mechanical components, with files readily available from projects by Christian Buil. The kit's 1:1 internal reduction ratio means there is no change in image scale through the optics, simplifying focus and image acquisition. Please note that this kit contains only the optical elements; the 3D-printed parts, adapters, and cameras must be sourced separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the Star'Ex LR IR Complement Optical Kit for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is an add-on optical kit that modifies a DIY Star'Ex Low Resolution spectroscope, extending its operational wavelength from the standard visible range (400-700 nm) into the near-infrared (650-1000 nm). It allows amateur astronomers to study the spectra of celestial objects in a different light band.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat else do I need to build a complete Star'Ex LR IR spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit contains \u003cstrong\u003eonly the optical components\u003c\/strong\u003e. To build a functional spectroscope, you must provide:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe 3D-printed body and mechanical parts (files are available online from the Star'Ex project).\u003c\/li\u003e\n\u003cli\u003eAn imaging camera and a \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguiding camera\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003eAdapters to connect the spectroscope to your telescope and cameras.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does a resolution of R=650 allow me to observe with the Star'Ex LR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA resolution of R=650 is considered low-resolution \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e, but it is powerful enough for many amateur projects. It allows you to clearly identify the main spectral types of stars (O, B, A, F, G, K, M), observe the prominent emission lines in nebulae like the Balmer series, and measure the redshift of bright galaxies and quasars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Star'Ex LR IR kit to observe the Hydrogen-alpha line in a nebula like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Hydrogen-alpha emission line is at 656.3 nm, which falls squarely within this kit's 650 nm to 1000 nm operational range. This makes it well-suited for studying H-alpha emissions in star-forming regions like the Orion Nebula (M42) and other emission nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 650 nm to 1000 nm range help when observing a carbon star in my 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eCarbon stars are very cool and emit a significant portion of their light in the near-infrared. Using this kit with your 8\" SCT, you can capture the deep absorption bands of molecules like cyanogen (CN) and carbon (C2) that are characteristic of these stars and are most prominent in the 650 nm to 1000 nm range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Star'Ex IR kit a standalone spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, it is not. This is an optical kit containing an IR objective lens, a 300 gr\/mm grating blazed at 1000 nm and a 570 nm order filter. It is intended for those undertaking the DIY project of building a Star'Ex spectroscope using 3D printing or other custom fabrication methods. You must build the instrument's body and supply all other non-optical components.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Resolution\u003c\/td\u003e\n\u003ctd\u003eR = 650 typical (@650 nm with a 23-micron slit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInfrared Wavelength Range\u003c\/td\u003e\n\u003ctd\u003e650 nm – 1000 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVisible Wavelength Range (Base Unit)\u003c\/td\u003e\n\u003ctd\u003e400 nm – 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollimator Focal Length\u003c\/td\u003e\n\u003ctd\u003e80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Focal Length\u003c\/td\u003e\n\u003ctd\u003e80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits spectrograph\u003c\/td\u003e\n\u003ctd\u003eStar'Ex LR\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e650-1000 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e[OP0167] 300 gr\/mm grating blazed at 1000 nm\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e[OP0184] Order filter at 570 nm, 25 mm diameter, 2 mm thick\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e[OP0183] NIR-optimized doublet objective, 80 mm focal length\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943032353053,"sku":"SHK-ES0033","price":713.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Star-Ex-LR-spectroscope-IR-complement-1_36e29a9d-3d79-4486-b205-a08c7e440228.jpg?v=1789615964"},{"product_id":"shelyak-es0034","title":"Shelyak UVEX Motorized Spectroscope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eFull remote control of grating, focus, and calibration\u003c\/li\u003e\n\u003cli\u003eAchromatic design covers a 350 nm to 1µm spectral range\u003c\/li\u003e\n\u003cli\u003eResolving power of R=1700 with the included 600 l\/mm grating\u003c\/li\u003e\n\u003cli\u003e6-position manual slit: 25µm, 50µm, 100µm, 300µm, 25µm hole, 3mm hole\u003c\/li\u003e\n\u003cli\u003eOptimized for F\/8 telescopes\u003c\/li\u003e\n\u003cli\u003eFully documented USIS communication protocol for your own tools\u003c\/li\u003e\n\u003cli\u003eWeighs 1.46 Kg without cameras\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak UVEX Motorized Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak UVEX Motorized spectroscope adds remote control of the grating angle and focus to the UVEX, which covers 350 nm to 1µm. Optimized for F\/8 systems, this 1.46 Kg instrument achieves a resolving power of R=1700 at 650 nm. Its multi-position slit offers six manual positions from a 25µm slit to a 3mm hole, and the motors module communicates with the computer through the documented USIS protocol.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eShelyak UVEX Motorized: Remote Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eThe motorized UVEX is the ultimate version of the UVEX, allowing remote operation. You can remotely control the central wavelength (grating angle), adjust the spectroscope's focus, and switch the external calibration module.\u003c\/p\u003e\n\u003cp\u003eThis makes it easy to take dark, flat and calibration images remotely, and the Demetra version for the motors module adds image sequences that link several series of images.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA Crossed Czerny-Turner System for a 350 nm to 1µm Range\u003c\/h3\u003e\n\u003cp\u003eAt the heart of the UVEX is a crossed Czerny-Turner optical design. Its main optics are two spherical mirrors, a \u003ca href=\"\/en-int\/collections\/collimation-tools\"\u003ecollimator\u003c\/a\u003e (M1) and an objective (M2), and these mirrors are what let the UVEX go far into the blue (UV) and red (IR), since a mirror is purely achromatic.\u003c\/p\u003e\n\u003cp\u003eTo counteract the natural astigmatism of this design and produce a sharp, thin spectrum, a cylindrical lens is placed near the camera sensor, concentrating more light on each pixel.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAn R=1700 Resolving Power with the 600 l\/mm Grating\u003c\/h3\u003e\n\u003cp\u003eThe UVEX ships with a 600 lines\/mm grating blazed at 500 nm, which delivers a resolving power (R) of approximately 1700 at 650 nm. Resolving power is R = λ\/Δλ; these figures are theoretical, calculated with the standard 23µm slit, and a wider slit reduces them.\u003c\/p\u003e\n\u003cp\u003eThe instrument is designed for flexibility, allowing you to swap out the standard grating for optional higher or lower-resolution gratings (150, 300, 1200, and 1800 l\/mm are available). Each grating comes with its own vernier. Remember to set the grating density in the software, since the angle-to-wavelength relation depends on it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e6 Manual Positions from 25µm to a 3mm Hole\u003c\/h3\u003e\n\u003cp\u003eThe UVEX features a multi-position slit module that is adjusted manually at the instrument. While grating and focus are motorized, slit selection requires physical access. The slit is changed with the supplied Phillips screwdriver, and offers six positions:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour Slit Widths:\u003c\/strong\u003e 25µm, 50µm, 100µm, and 300µm. Narrower slits give more resolution, wider slits let in more light. Other slits are optional, and Alpy slits fit the UVEX.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e25µm Hole:\u003c\/strong\u003e Mainly for test purposes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3mm Hole:\u003c\/strong\u003e The \"slitless\" position.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eOptimizing for the F\/8 Focal Ratio\u003c\/h3\u003e\n\u003cp\u003eThe UVEX is optically optimized for a telescope focal ratio of F\/8. It is particularly suitable for \u003ca href=\"\/en-int\/collections\/ritchey-chretien-and-dall-kirkham\"\u003eRitchey-Chrétien\u003c\/a\u003e (RC) telescopes up to 400mm in diameter at F\/8.\u003c\/p\u003e\n\u003cp\u003eFor the manual UVEX, Shelyak adds that you can go up to F\/5 without vignetting, at the cost of a slight degradation in quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eM42x0.75 Threads and a 13mm Back Focus Constraint\u003c\/h3\u003e\n\u003cp\u003eThe UVEX connects to your imaging train via a female M42x0.75 T-thread on the included guiding module adapter. The UVEX attaches to the telescope through the guiding module (sold separately), and this adapter thread can take any optics or device. On the camera side, an adapter ring for ZWO cameras is included; adapters for QHY and Atik cameras are available from Shelyak.\u003c\/p\u003e\n\u003cp\u003eA critical consideration is the camera back focus. Due to the compact optical layout, the acquisition camera must have a maximum back focus of 13mm. Check your camera's backfocus before choosing it.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSensor and Back Focus Requirements for UVEX\u003c\/h3\u003e\n\u003cp\u003eBesides the 13mm maximum backfocus, note that the spectrum on the sensor is about 20mm long; a smaller sensor records part of it at each grating angle.\u003c\/p\u003e\n\u003cp\u003eThe recommended camera for the UVEX is the ZWO ASI533 MM Pro, and the Demetra version for the motors module takes CMOS cameras into account with its CMED correction step.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMotorized Integration with External Modules\u003c\/h3\u003e\n\u003cp\u003eThe \"Motorized\" designation refers to three core remote functions. The first two, grating angle and focus, are driven by two stepper motors in the motors module. The third is the ability to control an external calibration module. A dedicated control cable is included for this purpose, so the motors module can switch the external calibration module between Sky, Dark, Flat and Calibration; this control is equivalent to the SPOX module.\u003c\/p\u003e\n\u003cp\u003eThree buttons and LEDs on the module also allow local control during installation and tests. The motors keep their position in memory, and the grating can rotate indefinitely. If only USB is connected, the controller starts but the motors cannot move until the 12V supply is plugged in.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDEMETRA and the Open USIS Communication Protocol\u003c\/h3\u003e\n\u003cp\u003eThe motors module comes with a new version of DEMETRA, which is recommended because it controls the UVEX transparently during acquisitions. It adds calibration \"by set line\" (the dispersion law is set once and readjusted on a well-identified line, useful from UV to IR where reference lines are few), motors module control, image sequences, and CMOS camera support through the CMED correction step.\u003c\/p\u003e\n\u003cp\u003eFor users who want to integrate the UVEX into custom automation platforms, communication uses the USIS protocol, a fully documented serial protocol, so you can develop your own tools with no restriction. Shelyak also provides the USIS Controller program (Windows) for direct control without DEMETRA, and says it may work on ASCOM and INDI drivers depending on demand.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eObserving Projects\u003c\/h3\u003e\n\u003cp\u003eWith interchangeable gratings and coverage from the near UV to the near IR, the UVEX suits many projects.\u003c\/p\u003e\n\u003cp\u003eTypical science targets include:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBe Stars:\u003c\/strong\u003e Monitoring the H-alpha emission line profile to track changes in the star's circumstellar disk.\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eVariable Stars:\u003c\/strong\u003e Following changes in their spectral features.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFar UV and IR:\u003c\/strong\u003e Using calibration by set line to work at the ends of the range, where reference lines are few.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 1.46 kg Instrument for Robotic Observatories\u003c\/h3\u003e\n\u003cp\u003eThe UVEX Motorized, without cameras, has a mass of 1.46 kg and dimensions of 153 x 154 x 133 mm. The manual gives 2.53 kg with an acquisition camera, the calibration and guiding modules and a \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguiding camera\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eShelyak's recommended steps: install the main camera (13mm maximum backfocus), get first spectra on a table with any light source, calibrate the grating angle and focus motors, then add the guiding and calibration modules (sold separately), run a full observation with an optic in front of the UVEX, and only then install it on the telescope. The 12V \/ 1A \u003ca href=\"\/en-int\/collections\/power-accessories\"\u003epower supply\u003c\/a\u003e and the USB 2 cable are not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary advantage of the Shelyak UVEX Motorized spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe main advantage is \u003cstrong\u003efull remote operation\u003c\/strong\u003e. You can control the central wavelength (grating angle), the focus and the external calibration module from your computer over USB 2, so dark, flat and calibration images can be taken remotely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the slit selection on the Shelyak UVEX Motorized also remote controlled?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the slit selection is a \u003cstrong\u003emanual process\u003c\/strong\u003e. You must physically access the instrument and use a screwdriver to rotate the slit wheel to one of the six positions (25µm, 50µm, 100µm, 300µm, 25µm hole, or 3mm hole). While the grating and focus are motorized for remote use, the slit is not.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope is an ideal match for the Shelyak UVEX Motorized's F\/8 optimum?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe UVEX is optimized for an \u003cstrong\u003eF\/8 focal ratio\u003c\/strong\u003e. It is particularly suitable for Ritchey-Chrétien (RC) telescopes up to 400mm in diameter at F\/8.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does a resolving power of R=1700 mean for observing a star like Vega with the Shelyak UVEX Motorized?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eVega (Alpha Lyrae) is an A-type star with strong Balmer absorption lines (H-alpha, H-beta, H-gamma and further into the UV). At R=1700 these broad lines are well resolved, and with the motorized grating you can step the central wavelength along the series remotely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are the power and data connection requirements for the Shelyak UVEX Motorized?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou need to provide your own power supply and data cable. The manual gives a \u003cstrong\u003e12 V (1 A minimum) supply\u003c\/strong\u003e with a 5.5 \/ 2.5 mm connector, positive in the center. For computer control, it uses a standard \u003cstrong\u003eUSB 2 cable\u003c\/strong\u003e. Neither the power supply nor the USB cable is included in the box.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy camera has a 17.5mm back focus. Can I use it with the Shelyak UVEX Motorized?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. Due to its compact optical design, the Shelyak UVEX Motorized has a very strict back focus requirement. The main acquisition camera must have a \u003cstrong\u003emaximum back focus of 13mm\u003c\/strong\u003e. A camera with 17.5mm of back focus will not be able to reach focus with this instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I control the Shelyak UVEX Motorized if I don't use the DEMETRA software?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou have two main options. Shelyak provides a simple \u003cstrong\u003eUSIS Controller\u003c\/strong\u003e program for direct control of the motors and calibration module. For more advanced integration, the \u003cstrong\u003eUSIS protocol\u003c\/strong\u003e is fully documented, so you can write your own tools in the language of your choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use other gratings besides the included 600 gr\/mm one with the Shelyak UVEX Motorized?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The UVEX is designed with interchangeable gratings. While it ships with the 600 gr\/mm grating (R≈1700), you can purchase optional gratings of 150, 300, 1200, and 1800 lines\/mm to change the instrument's dispersion and resolution to better suit different scientific targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a special filter to use the Shelyak UVEX Motorized in the near-infrared?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOften, yes. Shelyak's UVEX manual warns that above about 750 nm the second order of blue light can overlap the first order (400 nm at second order falls with 800 nm at first order). Shelyak offers an order filter that cuts light below 500 nm, held right after the slit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the 3mm hole on the Shelyak UVEX Motorized's slit module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe 3mm hole is the \"slitless\" position of the slit module; with it, light is not limited by a narrow slit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I take calibration images remotely with the Shelyak UVEX Motorized?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eConnect the supplied cable between the motors module and the external calibration module. From DEMETRA or the USIS Controller you can then switch between Sky, Dark, Flat and Calibration without touching the instrument.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the grating angle calibrated on the Shelyak UVEX Motorized?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThere is no reference position sensor. With the sky or the flat lamp lighting the slit, move the grating step by step until the 0th order (a sharp line) is in the middle of the image, then calibrate that position to 0 degrees. Focus is calibrated the same way, setting the best focus to 4 mm, the middle of the 0 to 8 mm range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Range\u003c\/td\u003e\n\u003ctd\u003e350 nm to 1µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptimal Telescope F-ratio\u003c\/td\u003e\n\u003ctd\u003eF\/8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit Module\u003c\/td\u003e\n\u003ctd\u003eMulti-position: 25µm, 50µm, 100µm, 300µm, 25µm hole and 3mm hole\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrating Control\u003c\/td\u003e\n\u003ctd\u003eMotorized (selects central wavelength)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFocus Control\u003c\/td\u003e\n\u003ctd\u003eMotorized (fine-tunes instrument focus)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration Control\u003c\/td\u003e\n\u003ctd\u003eMotorized control of external calibration module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCommunication Protocol\u003c\/td\u003e\n\u003ctd\u003eUSIS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e153 x 154 x 133 mm (without cameras)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.46 Kg (without camera)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving power (R)\u003c\/td\u003e\n\u003ctd\u003eR = 1700 @ 650 nm (600 l\/mm grating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 Female (guiding module adapter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSupplied grating\u003c\/td\u003e\n\u003ctd\u003e600 gr\/mm blazed at 500 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower supply\u003c\/td\u003e\n\u003ctd\u003e12 V \/ 1 A (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eComputer connection\u003c\/td\u003e\n\u003ctd\u003eUSB 2 (cable not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eUVEX spectroscope with motors module\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e600 gr\/mm grating blazed at 500 nm, mounted on its support\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTool set\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBag of spare screws\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eScrews for fixing the autoguiding module\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 4\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAdapter ring for ZWO cameras\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCalibration module control cable\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_UVEX_Motorized_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak UVEX Motorized Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Demetra_Software_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Demetra Software Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943032647965,"sku":"SHK-ES0034","price":9941.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-UVEX-motorized-1_c831c97a-5022-461b-8e52-940b2be7bd11.jpg?v=1789615972"},{"product_id":"shelyak-es0035","title":"Shelyak Optical kit for SUNSCAN spectroheliograph by STAROS Projects","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eBuild the STAROS Projects SUNSCAN spectroheliograph\u003c\/li\u003e\n\u003cli\u003eIncludes a 2400 lines\/mm holographic grating\u003c\/li\u003e\n\u003cli\u003eFeatures a 2-position slit with 7 µm and 10 µm options\u003c\/li\u003e\n\u003cli\u003eContains three 25 mm diameter doublets (75 mm, 100 mm, 200 mm focal lengths)\u003c\/li\u003e\n\u003cli\u003eAllows solar imaging at any user-selected wavelength\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Optical kit for SUNSCAN spectroheliograph by STAROS Projects\u003c\/h2\u003e\n\u003cp\u003eThis optical kit provides the essential components to build the STAROS Projects SUNSCAN, a stand-alone spectroheliograph capable of imaging the Sun at any wavelength you choose. The kit includes a 2400 lines\/mm holographic grating, a 2-position slit with 7 µm and 10 µm widths, and three doublets with 75 mm, 100 mm, and 200 mm focal lengths. STAROS Projects' SUNSCAN can be controlled from a smartphone or tablet application. The kit holds the optics only.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe SUNSCAN Spectroheliograph: A Custom-Wavelength Solar Imager\u003c\/h3\u003e\n\u003cp\u003eA spectroheliograph constructs a monochromatic image of the Sun by scanning its surface and capturing light from a single, narrow spectral line. This kit enables you to build the SUNSCAN instrument, which moves beyond fixed H-alpha or Calcium-K filters, allowing you to explore any spectral line of interest. \u003c\/p\u003e\n\u003cp\u003eWhat the finished instrument shows depends on the wavelength you select; the description, assembly and adjustment of the SUNSCAN are published by STAROS Projects at sunscan.net.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCore Optics: A 2400 lines\/mm Grating and 3 Doublets\u003c\/h3\u003e\n\u003cp\u003eThe kit contains seven optical elements. Their place in the instrument is described on the SUNSCAN website; the grating is the element that disperses sunlight into its spectrum.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHolographic Grating (2400 lines\/mm):\u003c\/strong\u003e 25 x 25 x 6 mm (OP0177).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoublet Lenses:\u003c\/strong\u003e Three 25 mm diameter doublets with focal lengths of 75 mm (OP0198), 100 mm (OP0199) and 200 mm (OP0212).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlat Mirror:\u003c\/strong\u003e A 23 x 16 x 5 mm flat mirror (OP0200).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNeutral Density Filter:\u003c\/strong\u003e A 31.75 mm neutral filter with a density of 0.9 (OP0211).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDual-Position 7 µm and 10 µm Slit\u003c\/h3\u003e\n\u003cp\u003eThe kit includes the SE0289 2-position slit, with 7 µm and 10 µm widths. As in any \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e, a narrower slit gives more spectral resolution and a wider one lets more light through.\u003c\/p\u003e\n\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCompleting the Project: What's Not Included in the Kit\u003c\/h3\u003e\n\u003cp\u003eThis product provides the optical elements only. To complete the SUNSCAN spectroheliograph, you must source the other parts yourself. The design and assembly instructions are maintained by STAROS Projects on their website.\u003c\/p\u003e\n\u003cp\u003eThese are not included:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3D-Printed Parts:\u003c\/strong\u003e The main structural body of the instrument.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eElectronics:\u003c\/strong\u003e The RP4 (Raspberry Pi 4) and the camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOther elements:\u003c\/strong\u003e The \u003ca href=\"\/en-int\/collections\/focusers\"\u003efocuser\u003c\/a\u003e and the \u003ca href=\"\/en-int\/collections\/tripods-and-piers\"\u003etripod\u003c\/a\u003e, among other complementary elements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eImportant Safety Note:\u003c\/strong\u003e Never look at the Sun directly through a telescope or any attached instrument. Always follow the complete assembly and operational instructions provided by the STAROS Projects team to ensure safe solar observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Shelyak optical kit a complete SUNSCAN spectroheliograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This is a kit containing \u003cstrong\u003eonly the optical elements\u003c\/strong\u003e required for the STAROS Projects SUNSCAN. The 3D-printed parts and complementary elements (focuser, camera, RP4, tripod and so on) are not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the 2400 lines\/mm grating in the SUNSCAN?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe holographic grating is the core component that splits sunlight into its spectrum. A high line count of \u003cstrong\u003e2400 lines\/mm\u003c\/strong\u003e provides high dispersion, which spreads the light out more. Shelyak does not publish a resolution figure for the SUNSCAN.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I choose between the 7 µm and 10 µm slits for the SUNSCAN?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe choice depends on your imaging goal. The \u003cstrong\u003e7 µm slit\u003c\/strong\u003e gives more spectral resolution; the \u003cstrong\u003e10 µm slit\u003c\/strong\u003e lets more light through. Follow the SUNSCAN project's guidance for your setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs building the SUNSCAN project suitable for a beginner?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is a self-build project: you source the 3D-printed parts and the complementary elements, then assemble and adjust the instrument following the SUNSCAN website. Judge the work involved from the instructions published there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the finished SUNSCAN instrument controlled?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SUNSCAN is designed by STAROS Projects as a stand-alone instrument. It can be controlled via a smartphone or tablet application. The RP4 is one of the elements you source yourself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I image the Sun in H-alpha with the completed SUNSCAN?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The principle of the spectroheliograph is to allow imaging at any user-selected wavelength. SUNSCAN images the Sun at the wavelength of your choice, so the hydrogen-alpha line (656.3 nm) is one option. Never view the Sun directly, and follow the project's instructions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of features can I see with the SUNSCAN that I can't see with a standard white-light solar filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA white-light filter shows you the Sun's photosphere, primarily sunspots and granulation. A completed SUNSCAN allows you to image the chromosphere in specific spectral lines. This reveals dynamic features like \u003cstrong\u003efilaments\u003c\/strong\u003e (dark ribbons of plasma), \u003cstrong\u003eplage\u003c\/strong\u003e (bright active regions), and \u003cstrong\u003eprominences\u003c\/strong\u003e (eruptions at the solar limb), which are invisible in white light.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhere can I find the assembly instructions and 3D printing files for the SUNSCAN?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe SUNSCAN is a project developed and maintained by STAROS Projects. The description, assembly and adjustment of the instrument are described at \u003cstrong\u003esunscan.net\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eKit type\u003c\/td\u003e\n\u003ctd\u003eOptical elements for the SUNSCAN spectroheliograph by STAROS Projects (optics only)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrating\u003c\/td\u003e\n\u003ctd\u003eHolographic, 2400 lines\/mm, 25 x 25 x 6 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit\u003c\/td\u003e\n\u003ctd\u003e2-position, 7 and 10 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoublet focal lengths\u003c\/td\u003e\n\u003ctd\u003e75 mm, 100 mm and 200 mm (25 mm diameter)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNeutral filter\u003c\/td\u003e\n\u003ctd\u003e31.75 mm, density 0.9\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDoublet, 25 mm diameter, 75 mm focal length (OP0198)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDoublet, 25 mm diameter, 100 mm focal length (OP0199)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDoublet, 25 mm diameter, 200 mm focal length (OP0212)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eFlat mirror, 23 x 16 x 5 mm (OP0200)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHolographic grating, 2400 lines\/mm, 25 x 25 x 6 mm (OP0177)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2-position slit, 7 and 10 µm (SE0289)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eNeutral filter, 31.75 mm, density 0.9 (OP0211)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943032877341,"sku":"SHK-ES0035","price":748.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-SUNSCAN-spectroheliograph-by-STAROS-Projects-1_1ba110d8-fb41-4767-b3f2-7f55279e097e.jpg?v=1789615981"},{"product_id":"shelyak-es0036","title":"Shelyak Optical kit for Sol’Ex spectroheliograph","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eBuild a high-resolution solar spectroheliograph\u003c\/li\u003e\n\u003cli\u003eAchieves 0.03 nm resolution at 650 nm with 10 µm slit\u003c\/li\u003e\n\u003cli\u003eTunable across the 400 nm to 700 nm visible spectrum\u003c\/li\u003e\n\u003cli\u003eFeatures a 2400 gr\/mm holographic grating\u003c\/li\u003e\n\u003cli\u003eIncludes 80mm and 125mm focal length doublets\u003c\/li\u003e\n\u003cli\u003eFor the Sol'Ex project proposed and led by Christian Buil\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Optical kit for Sol’Ex spectroheliograph\u003c\/h2\u003e\n\u003cp\u003eThis optical kit contains the core components to build your own Sol'Ex (Solar Explorer), a 3D-printed spectroheliograph capable of 0.03 nm resolution. The system is designed around a 2400 gr\/mm holographic grating and matched doublets with 80mm and 125mm focal lengths, enabling imaging across the entire 400 nm to 700 nm visible spectrum. Following Christian Buil's project, you make images of the Sun as if you had a particularly narrow filter (typically 0.3 Ångström), much narrower than any commercially available filter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Sol'Ex Project: Build a 0.03 nm Spectroheliograph\u003c\/h3\u003e\n\u003cp\u003eThe Sol'Ex is a do-it-yourself instrument project that allows you to capture high-contrast images of the Sun's chromosphere. Unlike a standard filter, a spectroheliograph builds an image line by line. It works by scanning the solar disk, isolating a very narrow slice of the spectrum, and reconstructing a complete monochromatic image with the help of dedicated software. Shelyak compares the principle to a photocopier, except that the copy is an image of the Sun, and says you can choose the wavelength anywhere in the visible range.\u003c\/p\u003e\n\u003cp\u003eAccessible wavelengths include H-alpha, H-beta, sodium, helium and calcium, with high-contrast views of the chromosphere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 2400 gr\/mm Grating and Matched Doublets\u003c\/h3\u003e\n\u003cp\u003eThis kit provides the four optical elements of the Sol'Ex: slit, grating and lenses. It is fully compatible with the 3D printing files on Christian Buil's website and with the mechanical kits offered by Azur3dPrint.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHolographic Grating (2400 gr\/mm):\u003c\/strong\u003e A 25 x 25 mm holographic grating (OP0177).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollimator Doublet (80mm FL):\u003c\/strong\u003e A 25.4 mm diameter collimator doublet (OP0176).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eObjective Doublet (125mm FL):\u003c\/strong\u003e A 25.4 mm diameter objective doublet (OP0181). With the 80 mm collimator, the internal reduction ratio is 125:80.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe GEN 2 Reflective Slit: 7 µm and 10 µm Apertures\u003c\/h3\u003e\n\u003cp\u003eThe kit includes the new GEN 2 reflective slit (SE0289), with two positions, 7 and 10 µm wide and 6 mm long.\u003c\/p\u003e\n\u003cp\u003eResolution is 0.03 nm at 650 nm with the 10 µm slit; the 7 µm position is narrower.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDIY Assembly and Telescope Matching at 450mm\u003c\/h3\u003e\n\u003cp\u003eThis is a kit of optical components only. You source the 3D-printed parts (STL files are on the Sol'Ex website, or Azur3dPrint offers mechanical kits) and the other components such as cameras and adapters. The project website gives the practical details for building and using the instrument in the field.\u003c\/p\u003e\n\u003cp\u003eSol'Ex should be mounted on a small telescope, with a focal length of 450 mm maximum, to see the whole Sun in a single image. A longer focal length is possible and gives more detailed images of portions of the disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFrom Sol'Ex Solar to Star'Ex Stellar Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eOnce you know your Sol'Ex, it can be turned towards other stars: Sol'Ex was transformed into Star'Ex (Star Explorer), a small very high resolution \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eTransforming your Sol'Ex into a Star'Ex requires a few additional optical components. These are in the separate Star'Ex HR complementary optical kit (ES0037). You can also choose the Star'Ex HR optical kit, which holds everything to build a Sol'Ex and then turn it into a Star'Ex HR.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Shelyak optical kit include the 3D-printed parts for the Sol'Ex?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This kit contains \u003cstrong\u003eonly the four optical elements\u003c\/strong\u003e: the grating, slit, collimator lens, and objective lens. You source the 3D-printed parts and the other components (cameras, adapters and so on) yourself. The STL files for printing are available on the official Sol'Ex project website.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope is required for the Sol'Ex spectroheliograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sol'Ex is designed for small telescopes. To capture the entire solar disk in a single image scan, use a \u003cstrong\u003efocal length of 450mm maximum\u003c\/strong\u003e. You can use a longer focal length telescope, which will provide higher magnification views of smaller sections of the Sun.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Sol'Ex 0.03 nm resolution compare to a standard H-alpha filter?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSol'Ex images look as if taken through a particularly narrow filter (typically 0.3 Ångström), much narrower than any commercially available filter, giving high-contrast views of the chromosphere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I observe in H-alpha with a Sol'Ex on a 400mm focal length refractor?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith 400mm of focal length, under Shelyak's 450mm maximum, the whole Sun fits in one image. Tuned to hydrogen-alpha (656.3 nm), you see chromospheric features such as prominences at the limb, filaments on the disk and bright plage.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the difference between the 7 µm and 10 µm slits on the Sol'Ex GEN 2 slit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe slit width determines the instrument's resolution. It reaches 0.03 nm at 650 nm with the \u003cstrong\u003e10 µm slit\u003c\/strong\u003e. The narrower \u003cstrong\u003e7 µm slit\u003c\/strong\u003e lets less light through.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs software included for processing the Sol'Ex solar scans?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Sol'Ex project includes dedicated, automatic image processing software. The result appears on screen in just a few clicks. The software comes from the Sol'Ex project, not with this kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of cameras are needed to complete the Sol'Ex build?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eShelyak does not name cameras; cameras are among the components you source. See the Sol'Ex project website for the camera choice.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I upgrade my Sol'Ex to a Star'Ex for stellar spectroscopy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sol'Ex is designed to be convertible into a stellar spectrograph called Star'Ex. This requires a few additional optical elements, in Shelyak's separate Star'Ex HR complementary optical kit (ES0037). This allows you to use the same core instrument to analyze the spectra of stars.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat safety precautions are necessary when using the Sol'Ex with a telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eWarning: Never look at the Sun directly through a telescope or the Sol'Ex instrument.\u003c\/strong\u003e Follow the instructions on the Sol'Ex project website.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution at 650 nm\u003c\/td\u003e\n\u003ctd\u003e0.03 nm (with 10 micron slit width)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 nm to 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e125:80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrating\u003c\/td\u003e\n\u003ctd\u003eHolographic, 2400 gr\/mm, 25 x 25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit\u003c\/td\u003e\n\u003ctd\u003eGEN 2 reflective, two positions, 7 and 10 µm wide, 6 mm long\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollimator\u003c\/td\u003e\n\u003ctd\u003eDoublet, 25.4 mm diameter, 80 mm focal length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective\u003c\/td\u003e\n\u003ctd\u003eDoublet, 25.4 mm diameter, 125 mm focal length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope focal length\u003c\/td\u003e\n\u003ctd\u003e450 mm maximum to image the whole Sun in one frame\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving Power (R)\u003c\/td\u003e\n\u003ctd\u003e0.03 nm @ 650 nm (10 µm slit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCollimator doublet, 25.4 mm diameter, 80 mm focal length (OP0176)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eObjective doublet, 25.4 mm diameter, 125 mm focal length (OP0181)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHolographic grating, 2400 gr\/mm, 25 x 25 mm (OP0177)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eGEN 2 reflective slit, 7 and 10 µm wide, 6 mm long (SE0289)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943033106717,"sku":"SHK-ES0036","price":593.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Sol-Ex-spectroheliograph-1_3515680a-873c-40f7-b32c-8a320113d37f.jpg?v=1789615989"},{"product_id":"shelyak-es0037","title":"Shelyak Optical kit for Star'Ex HR spectrograph - additional kit for Sol'Ex","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eEnables spectral resolution up to R=30,000\u003c\/li\u003e\n\u003cli\u003eCovers the visible spectrum from 400 nm to 700 nm\u003c\/li\u003e\n\u003cli\u003eDesigned for DIY 3D-printed spectrograph projects\u003c\/li\u003e\n\u003cli\u003eInternal optical reduction ratio of 125:80\u003c\/li\u003e\n\u003cli\u003eIncludes the GEN 2 slit for precise results\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eOptical kit for Star'Ex HR spectrograph - additional kit for Sol'Ex\u003c\/h2\u003e\n\u003cp\u003eThis add-on optical kit turns your existing Sol'Ex into a Star'Ex HR \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e capable of a spectral resolution up to R=30,000. It is designed to operate across the visible spectrum, from 400 nm to 700 nm, with the 125:80 ratio of the Sol'Ex optics.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-Resolution Spectroscopy: Up to R=30,000 Across the 400-700 nm Range\u003c\/h3\u003e\n\u003cp\u003eThe Star'Ex HR optical kit enables the detailed analysis of bright stellar and nebular spectra. A resolution of up to R=30,000 allows you to resolve fine details in spectral lines that are invisible to lower-resolution instruments, making it possible to study Doppler shifts, line broadening, and the complex chemistry of stars. The operational range of 400 nm to 700 nm ensures full coverage of the visible light spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 125:80 Reduction Ratio for Your 3D-Printed Spectrograph\u003c\/h3\u003e\n\u003cp\u003eThis kit is intended for Sol'Ex owners who build their instrument through 3D printing. It contains only the essential optical elements, including the new GEN 2 slit, but does not include any mechanical or 3D-printed parts. The 125:80 ratio comes from the Sol'Ex objective (125 mm) and \u003ca href=\"\/en-int\/collections\/collimation-tools\"\u003ecollimator\u003c\/a\u003e (80 mm) focal lengths. You must source the 3D printing files (available from Christian Buil's website) and all mechanical components separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eStar'Ex HR vs. Sol'Ex: From Solar Studies to High-Resolution Stellar Work\u003c\/h3\u003e\n\u003cp\u003eWhile the Sol'Ex project is optimized for studying a single, bright, extended source—the Sun—the Star'Ex HR adapts the concept for high-resolution \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e of bright objects such as stars and nebulae. The Star'Ex HR is the ideal solution for moving beyond solar observation to analyze the spectra of individual stars, planetary nebulae, and other bright emission targets. This optical kit provides the foundation for that transition, enabling more advanced scientific investigations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat else do I need to build a complete Star'Ex HR spectrograph with this kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit contains \u003cstrong\u003eonly the optical components\u003c\/strong\u003e. To complete the project, you will need your existing Sol'Ex (this add-on kit turns it into a Star'Ex HR), the 3D-printed Star'Ex parts, all necessary screws and hardware, a \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguiding camera\u003c\/a\u003e, and a science camera. The 3D printing files are available for free on Christian Buil's website, and mechanical kits are offered by third parties like Azur3dPrint.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I observe with the Star'Ex HR's R=30,000 resolution?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA spectral resolution of R=30,000 allows for detailed professional-amateur studies. You can clearly resolve the Sodium D lines (D1 and D2) in stellar spectra, measure the rotational velocity of stars through Doppler broadening, or observe Zeeman splitting in the spectral lines of stars with strong magnetic fields. It reveals a level of detail far beyond what is possible with simple grating spectrographs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Star'Ex HR optical kit for solar observing like the Sol'Ex?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis add-on kit is for Sol'Ex owners: it turns your existing Sol'Ex into a Star'Ex HR for high-resolution spectra of stars, nebulae and other bright objects. It adds the guiding optics (two 12.5 mm doublets and a 15x15 mm mirror) and the GEN 2 multi-width slit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Star'Ex HR perform on a bright Be star like Gamma Cassiopeiae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Star'Ex HR is exceptionally well-suited for targets like Gamma Cassiopeiae. Its high resolution would allow you to clearly resolve the double-peaked H-alpha emission line profile, which is characteristic of the gaseous disk surrounding Be stars. Monitoring changes in this profile over time is a key area of pro-am research that this instrument makes accessible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Star'Ex HR with an 8\" f\/10 SCT to study the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, an 8\" SCT is a great match for the Star'Ex HR. When pointed at the Trapezium region of the Orion Nebula (M42), you could use the spectrograph to separate the distinct emission lines of Hydrogen (H-alpha, H-beta) and Oxygen ([OIII]). The high resolution would allow you to study the velocity structure and turbulence within the nebula's brightest regions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhere can I find the 3D printing files for the Star'Ex HR spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe complete set of 3D printing files (STL format) and assembly instructions for the Star'Ex HR project are maintained by its creator, Christian Buil. They can be downloaded directly from his personal website, which is the official source for the project.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Resolution (R)\u003c\/td\u003e\n\u003ctd\u003eR = 700 to R = 30,000 depending on the slit width chosen\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 nm – 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e125 : 80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits spectrograph\u003c\/td\u003e\n\u003ctd\u003eSol'Ex\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving Power (R)\u003c\/td\u003e\n\u003ctd\u003eR = 700 to 30,000 (depending on slit width)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eOptical Kit Components (This kit contains only the required optical elements, namely two 12.5 mm doublets (50 mm focal length), a 15x15 mm mirror and the GEN 2 multi-width slit (14\/20\/26\/32 µm). 3D-printed parts, mechanical hardware, adapters, and cameras are not included and must be sourced separately.)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943033663773,"sku":"SHK-ES0037","price":247.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Star-Ex-HR-spectrograph-additional-kit-for-Sol-Ex-1_84812268-151f-48c0-8e26-67bf3edd436d.jpg?v=1789615996"},{"product_id":"shelyak-es0038","title":"Shelyak Optical kit for Star'Ex HR spectrograph - complete set","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAchieve spectral resolutions from R=700 up to R=30,000\u003c\/li\u003e\n\u003cli\u003eCovers the visible spectrum with a 400 nm to 700 nm wavelength range\u003c\/li\u003e\n\u003cli\u003eFeatures a high-dispersion 2400 gr\/mm holographic grating\u003c\/li\u003e\n\u003cli\u003eIncludes all optical components to build a Sol'Ex and then a Star'Ex HR\u003c\/li\u003e\n\u003cli\u003eFor the 3D-printed Star'Ex project proposed by Christian Buil\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Optical kit for Star'Ex HR spectrograph - complete set\u003c\/h2\u003e\n\u003cp\u003eThis Shelyak optical kit provides the core components for a high-resolution, 3D-printed instrument capable of achieving a spectral resolution from R=700 up to R=30,000. It operates across the visible spectrum from 400 nm to 700 nm using a 2400 gr\/mm holographic grating with an internal reduction ratio of 125:80 from its 80 mm collimator and 125 mm objective. This complete set includes all optics needed to build both the Sol'Ex solar \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e and the Star'Ex HR stellar spectrograph, for spectra of bright objects (stars, nebulae and more) with great detail in the spectral profile.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA DIY Spectrograph with R=30,000 Resolution\u003c\/h3\u003e\n\u003cp\u003eThis kit contains the essential optical elements to construct your own Star'Ex High Resolution (HR) spectrograph, a project developed by Christian Buil. You make the parts by 3D printing (or have them made), then assemble the instrument with the optics from this kit. Resolving power ranges from R = 700 to R = 30,000 depending on the slit width chosen.\u003c\/p\u003e\n\u003cp\u003eAs a key feature of the project, this complete kit also includes all the optical components required to first build a Sol'Ex instrument for solar \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e. Start with the Sol'Ex build to gain experience before converting it to the Star'Ex HR configuration for nighttime targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCore Optics: 80mm Collimator, 2400 gr\/mm Grating, and 125mm Objective\u003c\/h3\u003e\n\u003cp\u003eThe Sol'Ex part of the kit holds an 80 mm collimator doublet, a 2400 gr\/mm holographic grating and a 125 mm objective doublet, plus the 7\/10 µm slit.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e80 mm Collimator:\u003c\/strong\u003e A 25.4 mm diameter doublet (OP0176).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2400 gr\/mm Grating:\u003c\/strong\u003e A 25 x 25 mm holographic grating (OP0177).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e125 mm Objective:\u003c\/strong\u003e A 25.4 mm diameter doublet (OP0181); the internal reduction ratio is 125:80.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eDual GEN 2 Slits for Solar and Stellar Work\u003c\/h3\u003e\n\u003cp\u003eShelyak's resolution range (R = 700 to 30,000) depends on the slit width chosen. The kit includes two GEN 2 slits.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSol'Ex Slit:\u003c\/strong\u003e A GEN 2 reflective slit with two positions, 7 µm and 10 µm wide and 6 mm long (SE0289), for the Sol'Ex configuration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStar'Ex Slit:\u003c\/strong\u003e A GEN 2 multi-width slit with four positions: 14 µm, 20 µm, 26 µm, and 32 µm. These several widths let you adapt the Star'Ex configuration to the size of your telescope and the spectral resolution you want.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Star'Ex HR Guiding Path Components\u003c\/h3\u003e\n\u003cp\u003eThese elements are for guidance \/ Star'Ex.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuiding Doublets:\u003c\/strong\u003e Two 12.5 mm diameter doublets with a 50 mm focal length (OP0080).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMirror:\u003c\/strong\u003e A 15 x 15 mm mirror, 3 mm thick (OP0010).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCompleting Your Build Beyond the Optics\u003c\/h3\u003e\n\u003cp\u003eThis is a kit of optical components only. To assemble a functional Sol'Ex or Star'Ex HR spectrograph, you must source several other parts. A dedicated website gives all the information you need to assemble and operate the instrument.\u003c\/p\u003e\n\u003cp\u003eYou will need to acquire the following items separately:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3D-Printed Parts:\u003c\/strong\u003e The main body of the spectrograph is 3D printed. The necessary files are available for download from Christian Buil's project website.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Hardware:\u003c\/strong\u003e The kit is fully compatible with the mechanical kits offered by Azur3dPrint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCameras:\u003c\/strong\u003e Cameras are not included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdapters:\u003c\/strong\u003e Adapters are not included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThis Complete Kit vs. the Star'Ex HR Add-On Kit\u003c\/h3\u003e\n\u003cp\u003eShelyak offers two paths for building a Star'Ex HR spectrograph. Your choice depends on whether you are starting from scratch or already own a Sol'Ex.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThis Complete Kit (ES0038):\u003c\/strong\u003e Everything to build a Sol'Ex or a Star'Ex HR: the grating, collimator, objective, both slits and the guidance elements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStar'Ex HR Add-On Kit (ES0037):\u003c\/strong\u003e If you have already built a Sol'Ex, you only need this smaller kit. It contains just the parts to convert your Sol'Ex into a Star'Ex HR: the two 50 mm guiding doublets, the 15 x 15 mm mirror, and the multi-width 14-32 µm slit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the Shelyak Star'Ex HR Optical Kit used for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit provides all the necessary optical components to build a Star'Ex High Resolution (HR) spectrograph. Star'Ex lets you observe the spectra of bright objects (stars, nebulae and more) at high resolution, with great detail in the spectral profile. It also holds the optics for a Sol'Ex.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat else do I need to build the complete Star'Ex HR spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is an \u003cstrong\u003eoptics-only kit\u003c\/strong\u003e. To complete the project, you will need to source or fabricate the following items separately, with instructions found on the project website:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3D-Printed Body:\u003c\/strong\u003e Files are available from Christian Buil's project website.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Parts:\u003c\/strong\u003e The kit is compatible with Azur3dPrint mechanical kits.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdapters:\u003c\/strong\u003e To connect the spectrograph to your specific telescope and camera.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCameras:\u003c\/strong\u003e Not included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Star'Ex HR achieve a resolution up to R=30,000?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eResolving power ranges from R = 700 to R = 30,000 depending on the slit width chosen, with the \u003cstrong\u003e2400 gr\/mm grating\u003c\/strong\u003e. Which slit gives which figure is not specified.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I see in the spectrum of a star like Vega (Alpha Lyrae) with the Star'Ex HR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eVega is a bright A-type star with strong Balmer absorption lines (H-alpha at 656 nm, H-beta at 486 nm, H-gamma at 434 nm). At high resolution you record a part of the spectrum at a time and see the shape of a line in detail.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhich telescope can I use with the Star'Ex HR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThere is no telescope list for the Star'Ex HR; the multi-width slit lets you adapt the configuration to the size of your telescope. See the Star'Ex project website for telescope matching and the adapters you need.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the 400 nm to 700 nm wavelength range of the Star'Ex HR cover?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis range covers the entire visible light spectrum. It allows you to study many of the most important spectral features, including:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrogen-alpha (656 nm)\u003c\/strong\u003e and \u003cstrong\u003eHydrogen-beta (486 nm)\u003c\/strong\u003e lines in nebulae and stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSodium D lines (589 nm)\u003c\/strong\u003e, which are prominent in Sun-like stars.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnesium triplet (~517 nm)\u003c\/strong\u003e and many other metallic lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrogen-gamma (434 nm)\u003c\/strong\u003e in the violet part of the spectrum.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does this Shelyak kit include parts for a Sol'Ex and a Star'Ex?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Star'Ex project is an evolution of the Sol'Ex (solar explorer) project. This complete kit provides all the optics to build a Sol'Ex first, the solar instrument. Start with the Sol'Ex; then the additional elements (guidance doublets, mirror and multi-width slit) turn it into a Star'Ex HR for bright stars and other objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Resolution\u003c\/td\u003e\n\u003ctd\u003eR = 700 to R = 30,000 (depending on slit width)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 nm to 700 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e125 : 80\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrating\u003c\/td\u003e\n\u003ctd\u003eHolographic, 2400 gr\/mm, 25 x 25 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlits\u003c\/td\u003e\n\u003ctd\u003eGEN 2 reflective 7 and 10 µm (Sol'Ex); GEN 2 multi-width 14, 20, 26, 32 µm (Star'Ex)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollimator\u003c\/td\u003e\n\u003ctd\u003eDoublet, 25.4 mm diameter, 80 mm focal length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective\u003c\/td\u003e\n\u003ctd\u003eDoublet, 25.4 mm diameter, 125 mm focal length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCollimator doublet, 25.4 mm diameter, 80 mm focal length (OP0176)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eObjective doublet, 25.4 mm diameter, 125 mm focal length (OP0181)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHolographic grating, 2400 gr\/mm, 25 x 25 mm (OP0177)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eGEN 2 reflective slit, 7 and 10 µm wide, 6 mm long (SE0289)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDoublet, 12.5 mm diameter, 50 mm focal length (OP0080)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMirror, 15 x 15 mm, 3 mm thick (OP0010)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eGEN 2 multi-width slit, 14, 20, 26, 32 µm (SE0288)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943033925917,"sku":"SHK-ES0038","price":752.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Star-Ex-HR-spectrograph-complete-set-1_47c1963a-bc6f-4343-8132-6ed7439acecf.jpg?v=1789616005"},{"product_id":"shelyak-es0039","title":"Shelyak Optical kit for Star'Ex LR spectroscope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eBuild a complete Star'Ex Low Resolution spectroscope\u003c\/li\u003e\n\u003cli\u003eAchieves a typical resolution of R=650 at 650 nm\u003c\/li\u003e\n\u003cli\u003eDesigned for the visible spectrum from 400 nm to 700 nm\u003c\/li\u003e\n\u003cli\u003eFeatures an 80 mm focal length collimator and objective\u003c\/li\u003e\n\u003cli\u003eIncludes a GEN 2 multi-width slit (14, 20, 26, 32 µm)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Optical kit for Star'Ex LR spectroscope\u003c\/h2\u003e\n\u003cp\u003eThis optical kit provides the core components to build your own Star'Ex Low Resolution \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e, with a typical resolution of R=650 at 650 nm, for spectra of faint objects across 400 nm to 700 nm. Based on a 1:1 internal ratio with an 80 mm focal length for both the collimator and objective, and including a 300 gr\/mm grating, this kit is for the Star'Ex project proposed by Christian Buil, following on from Sol'Ex.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eBuild Your Own R=650 Spectroscope\u003c\/h3\u003e\n\u003cp\u003eStar'Ex LR lets you obtain spectra of faint stars and objects such as comets, galaxies and quasars, with a typical resolving power of R=650 at 650 nm.\u003c\/p\u003e\n\u003cp\u003eStar'Ex LR shows the entire visible spectrum, from blue to red, in a single shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Star'Ex Optical Path: 6 Core Components for 400-700 nm\u003c\/h3\u003e\n\u003cp\u003eThe Star'Ex is built around a simple and effective optical train with a 1:1 internal reduction ratio, using an 80 mm focal length for both the collimator and objective. All the optical elements needed to make a Star'Ex LR are included: slit, grating, lenses and guiding elements.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCollimator Doublet (80 mm FL):\u003c\/strong\u003e A 25.4 mm diameter collimator doublet (OP0176).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrating (300 gr\/mm):\u003c\/strong\u003e A 300 gr\/mm grating blazed at 500 nm (OP0158).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eObjective Doublet (80 mm FL):\u003c\/strong\u003e An objective doublet optimized for the visible (OP0182).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuiding Optics:\u003c\/strong\u003e A 15x15 mm mirror, 3 mm thick (OP0010), and two 12.5 mm diameter doublets with 50 mm focal length (OP0080); these are the guiding elements.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGEN 2 Slit:\u003c\/strong\u003e A multi-position slit with four selectable widths (14, 20, 26, 32 µm) (SE0288), the new GEN 2 slit.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCompleting Your Build: 3D Printing and System Integration\u003c\/h3\u003e\n\u003cp\u003eThis is a kit of optical components only. You make the parts by 3D printing, or have them made by a specialist, then assemble the instrument with the optics from this kit.\u003c\/p\u003e\n\u003cp\u003eTo complete your Star'Ex spectroscope, you will need to source the following items separately:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3D-Printed Parts:\u003c\/strong\u003e The main body and all structural components of the spectroscope must be 3D printed. The kit is fully compatible with the 3D printing files on Christian Buil's website, and a dedicated website gives what you need to assemble and operate the instrument.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Hardware:\u003c\/strong\u003e The kit is also compatible with the mechanical kits offered by Azur3dPrint. Adapters are not included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCameras:\u003c\/strong\u003e Cameras are not included.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe GEN 2 Slit: Four Widths from 14 µm to 32 µm\u003c\/h3\u003e\n\u003cp\u003eThe kit includes the new GEN 2 multi-width slit with four positions of 14, 20, 26 and 32 µm. A narrower slit gives more resolution and a wider one more light.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eUpgrade Path: Near-Infrared, 650 nm to 1000 nm\u003c\/h3\u003e\n\u003cp\u003eThis kit (ES0039) is engineered for the visible spectrum from 400 nm to 700 nm. With Shelyak's separate complementary IR optical kit (ES0033), you modify the Star'Ex LR to explore the near infrared.\u003c\/p\u003e\n\u003cp\u003eThe IR kit holds a 300 gr\/mm grating blazed at 1000 nm, a 570 nm order filter (25 mm diameter, 2 mm thick) and an objective optimized for the near infrared (80 mm focal length). With it the range is 650 nm to 1000 nm. It is not included in this kit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is included in the Shelyak Star'Ex LR optical kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis kit contains \u003cstrong\u003eonly the optical elements\u003c\/strong\u003e required to build a Star'Ex LR spectroscope. It includes the collimator and objective lenses, the 300 gr\/mm \u003ca href=\"\/en-int\/collections\/gratings-and-slits\"\u003ediffraction grating\u003c\/a\u003e, the GEN 2 multi-width slit, and the small lenses and mirror for the guiding system. It does not include the 3D-printed housing, mechanical screws, camera adapters, or any cameras.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat resolution can I expect with the Shelyak Star'Ex LR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Star'Ex LR is designed to achieve a typical resolution of \u003cstrong\u003eR=650\u003c\/strong\u003e at a wavelength of 650 nm. Shelyak presents the Star'Ex LR for faint stars and objects such as comets, galaxies and quasars. (The GEN 2 slit in the kit has 14, 20, 26 and 32 µm positions.)\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat else do I need to build a complete Star'Ex LR spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo complete your spectroscope, you will need to provide the following:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe 3D-printed body and components, using files from Christian Buil's project website.\u003c\/li\u003e\n\u003cli\u003eThe mechanical parts (the kit is compatible with Azur3dPrint mechanical kits).\u003c\/li\u003e\n\u003cli\u003eAn adapter to connect the Star'Ex to your telescope.\u003c\/li\u003e\n\u003cli\u003eCameras.\u003c\/li\u003e\n\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat would the Star'Ex LR show on a bright nebula like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNebulae are among Star'Ex targets. A bright emission nebula shows lines such as H-alpha, H-beta and the [O III] lines, all within the 400 to 700 nm range recorded in one shot.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Star'Ex LR on faint objects such as quasars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eStar'Ex LR targets include faint stars, comets, galaxies and quasars. No limiting magnitude is given, so what you reach depends on your telescope and camera.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this Star'Ex LR kit suitable for infrared (IR) spectroscopy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this specific kit is optimized for the visible spectrum (400 nm to 700 nm). Shelyak offers a separate, complementary optical kit (ES0033) to modify the Star'Ex LR for near-infrared (IR) observations from 650 nm to 1000 nm. That kit holds a 300 gr\/mm grating blazed at 1000 nm, a 570 nm order filter and an IR objective.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhere do I find the assembly instructions for the Star'Ex LR?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA dedicated website, from Christian Buil, gives all the information you need to assemble and operate the instrument; the kit is compatible with the 3D printing files there.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolution (@650 nm)\u003c\/td\u003e\n\u003ctd\u003eR = 650 typical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 nm to 700 nm (Visible)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInternal Reduction Ratio\u003c\/td\u003e\n\u003ctd\u003e1:1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCollimator Focal Length\u003c\/td\u003e\n\u003ctd\u003e80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eObjective Focal Length\u003c\/td\u003e\n\u003ctd\u003e80 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGrating\u003c\/td\u003e\n\u003ctd\u003e300 gr\/mm, blazed at 500 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit\u003c\/td\u003e\n\u003ctd\u003eGEN 2 multi-width, 14, 20, 26, 32 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving Power (R)\u003c\/td\u003e\n\u003ctd\u003eR = 650 typical @ 650 nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eGrating, 300 gr\/mm, blazed at 500 nm (OP0158)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDoublet, 12.5 mm diameter, 50 mm focal length (OP0080)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMirror, 15 x 15 mm, 3 mm thick (OP0010)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eGEN 2 multi-width slit, 14, 20, 26, 32 µm (SE0288)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCollimator doublet, 25.4 mm diameter, 80 mm focal length (OP0176)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eObjective doublet optimized for the visible, 80 mm focal length (OP0182)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e \n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943034155293,"sku":"SHK-ES0039","price":840.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Optical-kit-for-Star-Ex-LR-spectroscope-1_d1bfdc12-c43a-4de1-b63d-7ba51e81c514.jpg?v=1789616013"},{"product_id":"shelyak-op0024","title":"Shelyak Instruments 200µm Calibration Optical Fiber - 20m","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e20 meter length for flexible observatory layouts\u003c\/li\u003e\n\u003cli\u003e200µm core diameter optimized for calibration sources\u003c\/li\u003e\n\u003cli\u003eSecure FC-FC connectors for standard astronomical instruments\u003c\/li\u003e\n\u003cli\u003eNumerical Aperture of 0.22\u003c\/li\u003e\n\u003cli\u003eDurable stainless steel protective sheathing\u003c\/li\u003e\n\u003cli\u003eSignal attenuation less than 0.5dB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Instruments 200µm Calibration Optical Fiber - 20m\u003c\/h2\u003e\n\u003cp\u003eThis Shelyak Instruments 20-meter optical fiber uses a 200µm core to deliver a stable, high-fidelity signal for calibrating fiber-fed Echelle \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrographs\u003c\/a\u003e like the eShel or Whoppshel. The cable features industry-standard FC-FC connectors and a numerical aperture of 0.22, protected by a durable stainless steel sheath. With signal transmission close to 100% and total attenuation under 0.5dB, it ensures your calibration source light reaches the spectrograph with minimal loss, regardless of the 20-meter distance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003e200µm Core for High-Fidelity Spectrograph Calibration\u003c\/h3\u003e\n\u003cp\u003eThe 200µm core diameter is specifically sized to transmit light from a calibration unit to the spectrograph's fiber injection and guiding unit (FIGU). This diameter ensures a clean, uniform illumination of the spectrograph slit, which is essential for obtaining accurate and repeatable wavelength and flat-field calibrations. It is optimized for the controlled environment of a calibration lamp, not for collecting faint starlight.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRobust 20-Meter Construction with FC-FC Connectors\u003c\/h3\u003e\n\u003cp\u003eA generous 20-meter length provides the flexibility to position your spectrograph and calibration unit anywhere in the observatory or lab without signal degradation. The fiber is protected by a stainless steel sheath, safeguarding it from crushing or kinking during setup and use. Standard FC-FC connectors provide a secure, repeatable physical connection to Shelyak instruments and other compatible hardware.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eNear-100% Transmission for eShel and Whoppshel Systems\u003c\/h3\u003e\n\u003cp\u003eThis fiber is engineered for minimal signal loss, with a transmission rate approaching 100% through the fiber itself. Total system attenuation is kept below 0.5dB, a figure that remains constant even at this 20-meter length. While the fiber is highly efficient, remember that the primary source of light loss occurs at the connectors; ensuring clean, secure junctions is key to maintaining a pure calibration signal for your eShel or Whoppshel system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the core diameter 200µm for this Shelyak calibration fiber?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e200µm core diameter\u003c\/strong\u003e is specifically chosen to match the requirements of calibration units used with spectrographs like the Shelyak eShel. It provides a broad, even illumination of the spectrograph slit, which is critical for accurate flat-fielding and wavelength calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 20-meter length of this fiber reduce my calibration signal strength?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The fiber itself has a transmission rate close to 100%, and the total attenuation is rated at \u003cstrong\u003eless than 0.5dB\u003c\/strong\u003e. This low level of loss is independent of the fiber's length up to 20 meters, so you will not see a noticeable drop in signal compared to a shorter fiber.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat systems is the Shelyak 200µm fiber compatible with?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis fiber is primarily designed for Shelyak Instruments' own fiber-fed spectrographs, such as the \u003cstrong\u003eeShel\u003c\/strong\u003e and \u003cstrong\u003eWhoppshel\u003c\/strong\u003e systems. It uses standard \u003cstrong\u003eFC-FC connectors\u003c\/strong\u003e, making it potentially compatible with other astronomical or laboratory equipment that uses the same interface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI am setting up an eShel spectrograph in my observatory. Is this 20-meter fiber the correct one for connecting the calibration unit to the FIGU?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is the correct fiber for that purpose. The \u003cstrong\u003e200µm core\u003c\/strong\u003e is designed to carry the light from the calibration module to the Fiber Injection \u0026amp; Guiding Unit (FIGU) of the eShel. The 20-meter length offers ample flexibility for routing the cable between your telescope and the spectrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are FC-FC connectors and why are they used on this calibration fiber?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFC (Ferrule Connector) connectors are a type of fiber optic connector known for their secure, screw-on coupling mechanism. They provide excellent mechanical stability and repeatable alignment, which is critical in \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e to prevent signal fluctuations. The \u003cstrong\u003eFC-FC\u003c\/strong\u003e designation means the cable has this type of connector on both ends.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eMy calibration lamp seems dim when using the 20-meter fiber with my Whoppshel system. Is the fiber causing the light loss?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIt is unlikely the fiber itself is the cause, as its attenuation is less than 0.5dB. The most common source of signal loss in a fiber optic system is at the connection points. Ensure both \u003cstrong\u003eFC-FC connectors\u003c\/strong\u003e are perfectly clean (free of dust) and securely tightened to minimize junction loss and maximize signal throughput.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Diameter\u003c\/td\u003e\n\u003ctd\u003e200µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e20 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectors\u003c\/td\u003e\n\u003ctd\u003eFC-FC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumerical Aperture (NA)\u003c\/td\u003e\n\u003ctd\u003e0.22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtective Sheath\u003c\/td\u003e\n\u003ctd\u003eStainless Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Attenuation\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.5dB (independent of length up to 20m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Transmission\u003c\/td\u003e\n\u003ctd\u003eClose to 100%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrimary Loss Source\u003c\/td\u003e\n\u003ctd\u003eJunctions at connector level\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits spectrograph\u003c\/td\u003e\n\u003ctd\u003eeShel, Whoppshel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Instruments 200µm Calibration Optical Fiber - 20m\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943034384669,"sku":"SHK-OP0024","price":1090.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Calibration-optical-fiber-200-m-20m-1_30bcab48-6050-4176-97b9-b25001d0cf83.jpg?v=1789616021"},{"product_id":"shelyak-op0094","title":"Shelyak Prism 3.8° for the Star Analyser","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e3.8° prism angle precisely calculated for the Star Analyser\u003c\/li\u003e\n\u003cli\u003eImproves spectral resolution by approximately 20%\u003c\/li\u003e\n\u003cli\u003eAchieves a resolving power of R~130\u003c\/li\u003e\n\u003cli\u003eCorrects optical coma inherent in converging beam setups\u003c\/li\u003e\n\u003cli\u003eOptimized for advanced applications like nova and supernova characterization\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003ePrism 3.8° for the Star Analyser\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Prism 3.8° for the Star Analyser is an optical enhancement designed to increase its resolving power by approximately 20%. This accessory corrects for coma inherent in the Star Analyser's simple design, pushing its performance to a resolving power of R~130. By adding this 3.8° prism, you can extract more detailed spectral data from your existing setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eCorrect Coma and Boost Resolution by 20% to R~130\u003c\/h3\u003e\n\u003cp\u003eThe Star Analyser's effectiveness comes from its simplicity—placing a \u003ca href=\"\/en-int\/collections\/gratings-and-slits\"\u003ediffraction grating\u003c\/a\u003e directly into a telescope's converging light path. However, this introduces optical coma, which can soften spectral lines. The 3.8° Prism is specifically calculated to counteract this aberration, resulting in a sharper spectrum and an approximate 20% improvement in resolving power, achieving R~130.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIs the 3.8° Prism Necessary for Your Spectroscopy?\u003c\/h3\u003e\n\u003cp\u003eThis prism is not a requirement for everyone. If you are using the Star Analyser to explore the basics of \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e, the standard configuration is more than sufficient. However, if your goal is to push the instrument to its analytical limits for scientific contribution—such as characterizing the spectral evolution of novae or supernovae—this 3.8° prism is an essential upgrade.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main purpose of the Prism 3.8° for the Star Analyser?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary purpose of the 3.8° Prism is to improve the optical quality and resolution of spectra produced by a Star Analyser grating. It specifically corrects for \u003cstrong\u003ecoma\u003c\/strong\u003e, an aberration introduced when the grating is placed in a converging telescope beam, boosting resolution by about \u003cstrong\u003e20% to R~130\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 3.8° Prism for the Star Analyser improve resolution?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe prism works by pre-correcting the light path before it reaches the diffraction grating. Its \u003cstrong\u003e3.8° wedge angle\u003c\/strong\u003e is precisely calculated to cancel out the coma that the simple, in-beam placement of the Star Analyser would otherwise create. This results in sharper, better-defined spectral lines and therefore higher effective resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need this 3.8° Prism if I'm just starting with spectroscopy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this prism is generally not necessary for beginners. The standard Star Analyser is an excellent tool for learning and discovering spectroscopy. This 3.8° prism is an upgrade for users who want to push the Star Analyser to its maximum performance for more demanding applications, like pro-am collaborations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the 3.8° Prism to study the spectrum of a bright supernova like SN 2023ixf?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an ideal application. Characterizing novae and supernovae is a key use case for this prism. The increased resolution to \u003cstrong\u003eR~130\u003c\/strong\u003e allows for better identification and monitoring of spectral features as the event evolves, providing more valuable scientific data than the Star Analyser could achieve on its own.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of optical aberration does the Prism 3.8° correct in my f\/8 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe prism is designed to correct for \u003cstrong\u003ecoma\u003c\/strong\u003e that is introduced by the Star Analyser itself, not the telescope. When you place the grating in the converging f\/8 light cone of your SCT, coma is created. The 3.8° Prism is engineered to minimize this specific aberration, leading to a cleaner spectrum regardless of your telescope's native optical quality.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 3.8° Prism for the Star Analyser change how I process my spectra?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe prism does not fundamentally change the data acquisition or processing workflow. You will still capture and calibrate your spectra using the same software (like Demetra). The primary difference will be in the final result: you will start with a sharper raw image, allowing for a more precise and higher-resolution final spectral profile.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving power (R)\u003c\/td\u003e\n\u003ctd\u003eR~130 (with Star Analyser)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits (mount \/ scope)\u003c\/td\u003e\n\u003ctd\u003eStar Analyser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Spectrograph\u003c\/td\u003e\n\u003ctd\u003eStar Analyser\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Prism 3.8° for the Star Analyser\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_Star_Analyser_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak Star Analyser Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943034614045,"sku":"SHK-OP0094","price":116.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Prism-3-8-for-the-Star-Analyser-1_4033f785-10e6-4816-acc7-23ef1ad0c1cf.jpg?v=1789616029"},{"product_id":"shelyak-pf0008","title":"Shelyak FIGU F\/6 – 50µm Fiber Injection and Guiding Unit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eeShel Spectrograph Interface: Mounts at the telescope focus to feed starlight into the required optical fiber for Shelyak eShel and Whoppshel systems.\u003c\/li\u003e\n\u003cli\u003eIntegrated Guiding Port: Allows a user-supplied guide camera to view the field of view for precise target acquisition and on-axis guiding.\u003c\/li\u003e\n\u003cli\u003eSystem-Matched Design: Engineered to work with the specific focal ratios common to telescopes used for high-resolution spectroscopy.\u003c\/li\u003e\n\u003cli\u003eDual-Source Input: A remote-controlled mirror switches between the target starlight and an external calibration light source.\u003c\/li\u003e\n\u003cli\u003eDedicated Calibration Fiber Port: Accepts a secondary fiber from a calibration unit for acquiring essential reference frames.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak FIGU F\/6 – 50µm Fiber Injection and Guiding Unit\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak FIGU (Fiber Injection and Guiding Unit) is the critical interface between your telescope and an eShel or Whoppshel \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e. It mounts at the telescope's focus to precisely inject starlight into the instrument's small-diameter optical fiber. This unit integrates on-axis guiding and remote source selection, forming the heart of your spectroscopic data acquisition system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePrecise Fiber Injection for Shelyak eShel Spectrographs\u003c\/h3\u003e\n\u003cp\u003eThis unit is engineered for specific telescope focal ratios to ensure optimal light coupling into the small-diameter optical fiber required by Shelyak echelle spectrographs. To achieve and maintain this critical alignment, the FIGU incorporates a port for a \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguiding camera\u003c\/a\u003e (not included). This allows you to view the starfield directly, center your target perfectly on the fiber's microscopic entrance, and maintain accurate tracking throughout the exposure for maximum signal-to-noise ratio.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRemote Mirror for Starlight and Calibration Switching\u003c\/h3\u003e\n\u003cp\u003eThe FIGU includes a remote-controlled internal mirror that enables instantaneous switching between two light sources. In one position, it directs starlight from the telescope into the science fiber. In the other, it accepts light from a calibration module via a separate, larger-diameter optical fiber. This function is essential for capturing reference spectra like flats or arcs without altering the telescope's position or the instrument setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the main purpose of the Shelyak FIGU F\/6 – 50µm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts primary role is to act as an interface at the telescope's focus, precisely injecting the light from a star into the optical fiber of an eShel or Whoppshel spectrograph while also allowing for guiding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat else do I need to use the Shelyak FIGU?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will need a compatible telescope with the correct focal ratio, a Shelyak eShel or Whoppshel spectrograph, a guiding camera, and a calibration module with its own optical fiber. These items are not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Shelyak FIGU help with guiding on a target star like Deneb (Alpha Cygni)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe FIGU has a port for a guide camera that sees the area around the fiber entrance. You can place Deneb directly on the fiber, and then use the guide camera to keep it perfectly centered during long exposures, preventing signal loss from atmospheric turbulence or tracking errors.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the remote-controlled mirror on the FIGU work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe internal mirror can be electronically flipped between two positions. One position directs the light from the telescope to the spectrograph's fiber. The other position blocks the starlight and instead directs light from a separate calibration fiber into the spectrograph, allowing you to take calibration frames.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Shelyak FIGU with any telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this FIGU model is specifically designed for telescopes operating at a particular focal ratio to ensure the light cone correctly matches the acceptance angle of the optical fiber. Using it with significantly faster or slower telescopes will result in inefficient light injection.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is switching to a calibration source important for spectroscopy with the FIGU and an eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eHigh-resolution \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e requires calibration frames (like Thorium-Argon lamps) to accurately wavelength-calibrate the science data. The FIGU's remote switching lets you capture these calibration frames immediately before or after your science exposure without touching the setup, ensuring the highest possible accuracy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-side connection\u003c\/td\u003e\n\u003ctd\u003ethread: M42x0.75 (T2); gender: None\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-side connection\u003c\/td\u003e\n\u003ctd\u003ethread: C-mount; gender: None\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits (mount \/ scope)\u003c\/td\u003e\n\u003ctd\u003eeShel, Whoppshel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits Spectrograph\u003c\/td\u003e\n\u003ctd\u003eeShel, Whoppshel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak FIGU F\/6 – 50µm Fiber Injection and Guiding Unit\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Installation_and_Maintenance_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Installation and Maintenance Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943034843421,"sku":"SHK-PF0008","price":5356.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-FIGU-F-6-50-m-1_a71ab7fe-6e99-42cb-aa9d-6aa919ad831c.jpg?v=1789616037"},{"product_id":"shelyak-pf0011","title":"Shelyak eShel III Spectroscope","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eProfessional-level fiber-fed echelle spectroscope module\u003c\/li\u003e\n\u003cli\u003eResolving Power (R) of 10,000\u003c\/li\u003e\n\u003cli\u003eWide spectral range from 390nm to 750nm\u003c\/li\u003e\n\u003cli\u003eUtilizes diffraction orders 32 to 53\u003c\/li\u003e\n\u003cli\u003eIncludes 85 mm F\/1.8 imaging lens with Canon EOS mount\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak eShel III Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak eShel is a professional-level, fiber-fed echelle spectroscope that delivers a resolving power of R=10,000 across a wide 390nm to 750nm spectral range. Its optical design uses diffraction orders 32 to 53 to capture high-resolution stellar data, which is then focused onto your camera's sensor by the included 85 mm F\/1.8 lens. It needs a FIGU, a calibration module and optical fibers to work; Shelyak's example of a use that needs both resolution and range is the study of exoplanets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe eShel Spectroscope: A Professional-Level Instrument\u003c\/h3\u003e\n\u003cp\u003eShelyak developed the eShel from its experience with the Musicos and Narval professional spectroscopes. It is not a standalone device: this spectroscope module is the centre of a complete system.\u003c\/p\u003e\n\u003cp\u003eTo become operational, the eShel spectroscope must be paired with a Fiber Injection and Guiding Unit (FIGU), a calibration module, and optical fibers. All of them are included in the complete eShel system (ES0006). The fiber lets the instrument sit away from the telescope, if possible in a temperature-controlled room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eEchelle and Cross-Dispersion: Capturing Orders 32 to 53\u003c\/h3\u003e\n\u003cp\u003eThe eShel achieves its combination of high resolution and broad wavelength coverage using an echelle optical design. An echelle grating disperses the light at high orders (32 to 53), and these orders overlap.\u003c\/p\u003e\n\u003cp\u003eA second optical element, a cross-disperser prism, then separates these orders vertically. This \"slices\" the spectrum into successive orders that occupy the surface of the camera sensor. An echelle spectrum reads \"like a book\": the end of one order is found at the beginning of the next.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eR=10,000 Resolving Power Across a 390nm to 750nm Range\u003c\/h3\u003e\n\u003cp\u003eThe eShel delivers a resolving power of R=10,000; it reaches more than 10,000 with an ATIK 460EX camera in 2x2 binning (camera not included). The fiber feed increases the accuracy of radial velocity measurements.\u003c\/p\u003e\n\u003cp\u003eShelyak's specification gives 390 to 750nm (its descriptive text says about 390 to 700nm). The whole range comes in one exposure, so lines such as H-alpha and the sodium doublet are recorded together.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe 50µm Fiber and the FIGU\u003c\/h3\u003e\n\u003cp\u003eThe eShel is a fiber-fed instrument. The starlight collected by the telescope is focused into a 50µm optical fiber by the Fiber Injection and Guiding Unit (FIGU). This fiber transports the light to the \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e, which can be placed in a quiet, temperature-controlled room away from the telescope.\u003c\/p\u003e\n\u003cp\u003eThe installation manual says the fiber link gives the best mechanical and thermal stability for accurate radial velocity measurements.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMatching the eShel to Your Telescope\u003c\/h3\u003e\n\u003cp\u003eThe Fiber Injection and Guiding Unit (FIGU) is designed to be mounted on the telescope and has an M42x0.75 T-mount interface with about 45mm backfocus. For an f\/10 \u003ca href=\"\/en-int\/collections\/schmidt-cassegrain-telescopes\"\u003eSchmidt-Cassegrain\u003c\/a\u003e, the manual recommends a standard SCT 0.63x \u003ca href=\"\/en-int\/collections\/flatteners-and-reducers\"\u003efocal reducer\u003c\/a\u003e and a variable \u003ca href=\"\/en-int\/collections\/imaging-adapters\"\u003eT-adapter\u003c\/a\u003e. The FIGU F\/6 is the standard version; an F\/9 FIGU is also offered.\u003c\/p\u003e\n\u003cp\u003eThe FIGU contains a small mirror with a 50µm hole at its center. A \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguiding camera\u003c\/a\u003e views this mirror, allowing you to precisely center the target star on the hole. When the star is centered, its light goes into the object fiber and the star center disappears from the guiding image, so your autoguiding software must be able to guide through an optical fiber.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFC\/PC, T-Mount, and Canon EOS Connections\u003c\/h3\u003e\n\u003cp\u003eThe spectroscope has an FC\/PC connector for the 50µm object fiber.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope Side:\u003c\/strong\u003e The FIGU (sold separately) attaches to the telescope through its M42x0.75 thread, with the 2-inch adapter or a T-adapter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpectrograph Input:\u003c\/strong\u003e The 50µm object fiber connects to the main spectrograph module via an FC\/PC input connector.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCamera Side:\u003c\/strong\u003e The spectrograph outputs its focused spectrum through the included 85mm F\/1.8 lens, a Canon EOS lens. A Canon DSLR can be fitted directly, and astronomical cameras attach with the proper Canon EOS adapter; the backfocus range is limited (less than 9mm).\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMatching a Camera Sensor\u003c\/h3\u003e\n\u003cp\u003eThe installation manual describes a KAF1600 sensor (about 13x9mm) as well adapted to the eShel: its size allows good overlap between orders, needed to get a continuous spectrum.\u003c\/p\u003e\n\u003cp\u003eA pixel size of around 9µm provides appropriate sampling of the spectral lines for the instrument's dispersion. The manual recommends QSI516ws or QSI532ws cameras with the BA0023 adapter, and says any camera meeting these requirements can be used, even a DSLR.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eTungsten, LED, and Thorium-Argon Calibration Sources\u003c\/h3\u003e\n\u003cp\u003eAccurate data reduction requires a series of calibration frames, which come from the Calibration Module (sold separately). Its light reaches the FIGU through the 200µm calibration fiber, and a mirror in the FIGU sends it into the object fiber.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThorium-Argon (ThAr) Lamp:\u003c\/strong\u003e Used for wavelength calibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTungsten Lamp:\u003c\/strong\u003e Gives a smooth spectrum (a 2800 K Planck function) that the software uses to correct the blaze function, the grating's spectral vignetting on each order.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLEDs:\u003c\/strong\u003e Used with the tungsten light for the flat image that lights all orders and gives the geometry of the spectrum; the tungsten adds more red signal.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eData Acquisition and Reduction with Demetra\u003c\/h3\u003e\n\u003cp\u003eDemetra for eShel is free, runs under MS Windows and accompanies you from acquisition to data reduction, with remote control of the FIGU and calibration module.\u003c\/p\u003e\n\u003cp\u003eThe workflow includes:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrument Control:\u003c\/strong\u003e Demetra connects to your camera through ASCOM and controls the calibration module, for acquisition sequences of object, flat, dark and ThAr frames.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSession Management:\u003c\/strong\u003e It organizes your night's work, tracking which calibration files are needed for each target and using color-coding to show the status of each observation set.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomated Processing:\u003c\/strong\u003e Once all raw frames are acquired, Demetra performs the complex data reduction. This includes dark correction, order tracing, wavelength calibration, blaze correction and merging the orders into a calibrated 1D spectrum.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFrom Exoplanets to Pulsating Stars like BW Vulpeculae\u003c\/h3\u003e\n\u003cp\u003eShelyak's example spectra show what the eShel records.\u003c\/p\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eExoplanet Studies:\u003c\/strong\u003e Shelyak's example of a case that needs both resolution and spectral range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBe Stars:\u003c\/strong\u003e Studying the emission lines, such as H-alpha in stars like Delta Scorpii, which originate from circumstellar disks of gas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePulsating Variables:\u003c\/strong\u003e A time series of BW Vul (5-minute exposures over about 5 hours around the sodium doublet, 60cm f\/3.5 telescope at Pic du Midi).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNovae and Eruptive Stars:\u003c\/strong\u003e Raw spectra of WR 140 and a nova in Delphinus, and of Beta Lyrae and P Cygni.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eUnboxing the 85mm F\/1.8 Lens and Base for Your First Night\u003c\/h3\u003e\n\u003cp\u003eThis package contains the core eShel spectroscope module, the heart of your system. Included are the spectroscope, the base (for stability) and the 85mm F\/1.8 lens that focuses the spectrum onto your camera.\u003c\/p\u003e\n\u003cp\u003eGetting started involves a clear, methodical assembly process. You will mount the spectrograph to its base, attach the Canon EOS lens, and then mount your camera to the lens. Then connect the 50µm object fiber from the FIGU and take Thorium-Argon spectra to focus the lens, as the installation manual describes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is an echelle spectroscope and why is the eShel designed this way?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn echelle spectroscope uses a grating at high orders (32 to 53 for the eShel), then a cross disperser (a prism) separates the orders on the sensor. This gives high resolution and a wide spectral range in one image.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat additional components do I need to operate the Shelyak eShel Spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe spectroscope is the central module of a larger system. For operation, you will require several other components, which are sold separately or as part of a complete system package:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA \u003cstrong\u003eFiber Injection \u0026amp; Guiding Unit (FIGU)\u003c\/strong\u003e to inject starlight into the fiber.\u003c\/li\u003e\n\u003cli\u003eA \u003cstrong\u003eCalibration Module\u003c\/strong\u003e for wavelength and flat-field calibration.\u003c\/li\u003e\n\u003cli\u003eTwo \u003cstrong\u003eoptical fibers\u003c\/strong\u003e: a 50µm fiber for the star and a 200µm fiber for calibration.\u003c\/li\u003e\n\u003cli\u003eA compatible \u003cstrong\u003eastronomical camera\u003c\/strong\u003e and computer.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the Shelyak eShel use a fiber feed?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eShelyak chose a fiber to increase the accuracy of radial velocity measurements and for user comfort: the instrument is separated from the telescope, if possible in a temperature-controlled room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I use the Shelyak eShel with an f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a typical f\/10 Schmidt-Cassegrain Telescope (SCT), the manual recommends a standard SCT 0.63x focal reducer and a variable T-adapter, giving about f\/6.3 for the F\/6 FIGU. The FIGU itself attaches using a standard T-thread (M42x0.75) and has a 45mm backfocus requirement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the Shelyak eShel on the H-alpha line of a Be star like Delta Scorpii?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn example spectrum of delta Sco shows H-alpha in emission. At R=10,000 you see the profile of the line. You would acquire a spectrum of Delta Scorpii, and after processing the data in Demetra, you can follow the line's width and shape over time.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Thorium-Argon lamp in the calibration module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Thorium-Argon (ThAr) lamp is the wavelength calibration standard. It produces many emission lines at known wavelengths. The Demetra software identifies these lines in your calibration frame and builds a mathematical model that maps every pixel on your camera sensor to a precise wavelength, turning your raw image into a scientifically measurable spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of camera works with the Shelyak eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe included 85mm lens is a Canon EOS lens, so a Canon DSLR fits directly. The manual describes a 13x9mm sensor with 9µm pixels (KAF1600) as well adapted and recommends QSI516ws or QSI532ws cameras with the BA0023 adapter; the backfocus range is under 9mm. No camera is included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs there software for the Shelyak eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. Shelyak's Demetra for eShel is a free download. Demetra is a comprehensive package that handles spectra acquisition, remote control of the FIGU and calibration modules, and the complete data reduction pipeline, from raw 2D images to final, calibrated 1D spectra.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Shelyak eShel Spectroscope a standalone instrument?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. This product is the core spectroscope module only. It is designed to be the heart of a complete spectrographic system and requires additional components for operation, including the FIGU, calibration module, and optical fibers. The complete eShel system (ES0006) includes all of them.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I focus the Shelyak eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTurn the Canon EOS lens to focus while taking Thorium-Argon spectra. The manual suggests focusing around order 34, minimizing the horizontal FWHM of an isolated emission line; you can choose to favour another part of the spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstrument Type\u003c\/td\u003e\n\u003ctd\u003eFiber-Fed Echelle Spectroscope\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Range\u003c\/td\u003e\n\u003ctd\u003e390nm to 750nm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput Connector Type\u003c\/td\u003e\n\u003ctd\u003eFC\/PC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Requirement\u003c\/td\u003e\n\u003ctd\u003eRequires FIGU, Calibration Module, and Optical Fibers (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Software\u003c\/td\u003e\n\u003ctd\u003eDemetra (Free Download)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving power (R)\u003c\/td\u003e\n\u003ctd\u003eR = 10,000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiffraction orders\u003c\/td\u003e\n\u003ctd\u003e32 to 53\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope-Side Connection\u003c\/td\u003e\n\u003ctd\u003eFC\/PC fiber connector (50 µm object fiber)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eeShel spectroscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eBase\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e85 mm F\/1.8 lens\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943035072797,"sku":"SHK-PF0011","price":15573.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-eShel-III-Spectroscope-1_347805d2-ec23-482e-97ee-2fcea894c69b.jpg?v=1789616046"},{"product_id":"shelyak-pf0012","title":"Shelyak eShel Calibration Module","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eContains Thorium-Argon (ThAr) and Flat-Field Lamps\u003c\/li\u003e\n\u003cli\u003eDesigned for eShel and Whoppshel Spectroscopes\u003c\/li\u003e\n\u003cli\u003eCompatible with other fiber-fed Echelle systems\u003c\/li\u003e\n\u003cli\u003eRemotely controlled via RS 232 interface\u003c\/li\u003e\n\u003cli\u003eIntegrates with Demetra and Audela software\u003c\/li\u003e\n\u003cli\u003eControls FIGU mirror for source selection\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak eShel Calibration Module\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak eShel Calibration Module is an essential component for high-resolution \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e, providing the necessary Thorium-Argon (ThAr) and flat-field light sources for professional-grade data reduction. Designed for seamless integration with the eShel and Whoppshel \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscopes\u003c\/a\u003e, this unit automates the entire calibration process. It allows you to acquire wavelength reference spectra, blaze-correction flats and order-location flats remotely.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThorium-Argon and Flat-Field Lamps for Full Calibration\u003c\/h3\u003e\n\u003cp\u003eThis module houses the two critical light sources required for echelle spectroscopy. The Thorium-Argon lamp produces a dense forest of known emission lines across the visible spectrum, serving as an absolute reference for wavelength calibration. A tungsten lamp gives a smooth continuum that the software uses to correct each order for the grating blaze function, and LEDs used together with the tungsten lamp produce the flat image that locates the orders during processing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrated Remote Control for Automated Observations\u003c\/h3\u003e\n\u003cp\u003eThrough its RS 232 interface, the eShel Calibration Module connects directly to your control computer, enabling full remote operation from software like Demetra or Audela. This integration extends to controlling the FIGU mirror, which selects the light source fed to the spectroscope. You can programmatically switch between capturing your science target from the telescope and acquiring calibration frames without any manual intervention, streamlining your workflow for unattended or robotic observations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Shelyak eShel Calibration Module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eShel Calibration Module provides the two light sources necessary for calibrating high-resolution echelle spectrographs. It contains a \u003cstrong\u003eThorium-Argon (ThAr) lamp\u003c\/strong\u003e for precise wavelength calibration plus a tungsten lamp for blaze correction and LEDs that, with the tungsten lamp, give the flat image used to locate the orders.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the eShel Calibration Module with a non-Shelyak spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While it is designed for native integration with the Shelyak eShel and Whoppshel, the module can be used to calibrate any other fiber-fed Echelle spectroscope that requires ThAr and flat-field illumination.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does remote control of the eShel Calibration Module work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe module is controlled via an \u003cstrong\u003eRS 232 serial interface\u003c\/strong\u003e from your PC. It integrates directly with acquisition software like \u003cstrong\u003eDemetra\u003c\/strong\u003e or \u003cstrong\u003eAudela\u003c\/strong\u003e, allowing you to turn the lamps on\/off and switch the FIGU mirror between the telescope and calibration sources as part of an automated observing sequence.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy are both a ThAr and a flat lamp needed for the eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eEach lamp serves a distinct purpose:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThorium-Argon (ThAr):\u003c\/strong\u003e Produces a spectrum with thousands of well-documented emission lines. These act as a \"ruler\" to accurately map pixels on your detector to specific wavelengths.\u003c\/li\u003e\n\u003cli\u003e\nFlat sources: LEDs plus the tungsten lamp illuminate all orders so the software can find the geometry of the spectrum; the tungsten lamp alone gives a smooth continuum used to correct each order for the blaze function.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the eShel Calibration Module improve measurements of a star like 51 Pegasi?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhen searching for exoplanets via the radial velocity method, as was done with 51 Pegasi, incredibly small Doppler shifts in the star's spectrum must be measured. The ThAr lamp in the eShel Calibration Module provides the stable, high-precision wavelength reference required to detect these minute shifts, making such scientific work possible.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I am building a spectral library with my Whoppshel, is this module necessary?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, it is essential for creating an accurate library. The tungsten lamp gives the smooth continuum used to correct each order for the blaze function, and the LEDs with the tungsten lamp locate the orders during processing. The ThAr lamp provides the absolute wavelength calibration, so you can confidently compare your spectra to other observations and databases.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility\u003c\/td\u003e\n\u003ctd\u003eeShel, Whoppshel, and other fiber-fed Echelle spectrographs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration Sources\u003c\/td\u003e\n\u003ctd\u003eThorium-Argon (ThAr) lamp, tungsten lamp (blaze correction), LEDs (flat for order geometry)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Interface\u003c\/td\u003e\n\u003ctd\u003eRS 232\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware Integration\u003c\/td\u003e\n\u003ctd\u003eDemetra, Audela\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRemote Functions\u003c\/td\u003e\n\u003ctd\u003eLamp control, FIGU mirror source selection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHigh voltage power supply\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eThorium-Argon lamp\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eLEDs for the flat spectra\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eRS232 interface for PC control\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eConnection for 200 micron optical fiber\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMiscellaneous cables\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Calibration_Unit_Upgrade_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Calibration Unit Upgrade Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Calibration_Power_Supply_Addendum_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Calibration Power Supply Addendum Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943035564317,"sku":"SHK-PF0012","price":8513.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-eShel-calibration-module-1_c0ff1be3-f396-41a5-882e-b70e961c715a.jpg?v=1789616054"},{"product_id":"shelyak-pf0018","title":"Shelyak FIGU F\/9 – 50µm Fiber Injection \u0026 Guiding Unit","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eOptimized for F\/9 telescope optical systems\u003c\/li\u003e\n\u003cli\u003eInjects starlight into a 50µm core optical fiber\u003c\/li\u003e\n\u003cli\u003eIntegrated guiding port for precise target centering (camera not included)\u003c\/li\u003e\n\u003cli\u003eAccepts calibration light via a separate 200µm fiber\u003c\/li\u003e\n\u003cli\u003eRemote-controlled mirror for switching between star and calibration source\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak FIGU F\/9 – 50µm Fiber Injection \u0026amp; Guiding Unit\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak FIGU (Fiber Injection and Guiding Unit) F\/9 is engineered to mount at your telescope's focus, precisely channeling starlight from an F\/9 optical system into a 50µm fiber for analysis with an eShel or Whoppshel \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e. It features a remote-controlled mirror to instantly switch between your target star and a calibration module's 200µm fiber, ensuring seamless and accurate data acquisition for serious \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003ePrecision Fiber Injection for F\/9 Telescopes and 50µm Fibers\u003c\/h3\u003e\n\u003cp\u003eThe core function of the FIGU F\/9 is to solve the critical challenge of efficiently feeding a spectrograph. By matching the F\/9 light cone of your telescope to the 50µm core of the spectrograph's optical fiber, it maximizes light throughput and ensures your instrument receives the strongest possible signal, which is essential for capturing high-resolution spectra of faint targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrated Guiding and Calibration via a 200µm Fiber Input\u003c\/h3\u003e\n\u003cp\u003eThis unit integrates two essential functions for successful spectroscopy. A port for a \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguiding camera\u003c\/a\u003e (not included) allows you to view the telescope's field, locate your target, and guide directly on the star to keep it perfectly centered on the tiny 50µm fiber entrance. For calibration, a remote-controlled internal mirror flips to accept light from a 200µm fiber connected to your calibration module, letting you record reference spectra without altering your telescope's pointing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFIGU F\/9 vs. F\/6: Adapting for Slower Optical Systems\u003c\/h3\u003e\n\u003cp\u003eThis F\/9 model is a specialized variant of Shelyak's F\/6 FIGU, designed for telescopes with an F\/9 focus. It includes an integrated focal reducer that converts the telescope's F\/9 beam to the optimal input ratio for the spectrograph. This ensures that users of F\/9 systems achieve the same high efficiency and spectral resolution as those with faster telescopes, without needing external optical adapters.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Shelyak FIGU F\/9?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Shelyak FIGU F\/9 is a specialized adapter that mounts at your telescope's focus. Its primary job is to take the light from a star captured by your \u003cstrong\u003eF\/9 telescope\u003c\/strong\u003e and inject it precisely into the \u003cstrong\u003e50µm optical fiber\u003c\/strong\u003e that feeds a spectrograph like the Shelyak eShel, enabling you to perform scientific spectral analysis.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a separate guide camera for the FIGU F\/9?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, a guiding camera is required but \u003cstrong\u003enot included\u003c\/strong\u003e. The FIGU F\/9 has a dedicated port for a guide camera, which is essential for viewing the starfield, accurately placing your target onto the fiber's entrance, and maintaining precise tracking during an exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I switch between my star and my calibration lamp with the FIGU F\/9?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe FIGU F\/9 contains a \u003cstrong\u003eremote-controlled mirror\u003c\/strong\u003e inside the unit. This allows you to electronically switch the input source from the telescope's starlight to the light from your calibration module (fed via a 200µm fiber) without physically touching or disturbing the telescope setup, ensuring repeatable and accurate calibrations.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy choose the F\/9 version of the FIGU instead of the F\/6 version?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eChoose the F\/9 version when your telescope works at an F\/9 focus; for an f\/10 \u003ca href=\"\/en-int\/collections\/schmidt-cassegrain-telescopes\"\u003eSchmidt-Cassegrain\u003c\/a\u003e, use the F\/6 version with a standard 0.63x SCT focal reducer. The FIGU F\/9 includes a built-in focal reducer specifically to convert this slower light cone to the optimal angle for the spectrograph's fiber. Using the F\/6 version on an F\/9 telescope would result in significant light loss and inefficient performance. The F\/9 model is purpose-built for F\/9 telescopes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat spectrographs is the FIGU F\/9 – 50µm designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis unit is designed as a core component for Shelyak's own spectroscopy systems. It is the standard fiber injection unit for the \u003cstrong\u003eeShel\u003c\/strong\u003e and \u003cstrong\u003eWhoppshel\u003c\/strong\u003e spectrographs when used with an F\/9 telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the FIGU F\/9 help me get an accurate spectrum of Vega (Alpha Lyrae) with my F\/9 telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFirst, you would use the guiding port on the FIGU F\/9 to view the starfield and precisely center Vega (Alpha Lyrae) on the 50µm fiber optic input. Once centered, you can begin your exposure. Before or after, you use the remote control to flip the internal mirror, allowing light from your calibration lamp to enter the spectrograph. This provides a reference spectrum, which is critical for accurately calibrating the wavelength of the data you captured from Vega.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943036219677,"sku":"SHK-PF0018","price":6662.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-FIGU-F-9-50-m-1_0bbbc0c1-6cdd-4d37-9342-0f8e6a2df26e.jpg?v=1789616062"},{"product_id":"shelyak-pf0019","title":"Shelyak Calibration Optical Fiber - 200µm, 10m","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eCore Diameter:\u003c\/strong\u003e 200µm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 10 meters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnectors:\u003c\/strong\u003e FC-FC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumerical Aperture:\u003c\/strong\u003e 0.22\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtection:\u003c\/strong\u003e Stainless Steel Sheath\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAttenuation:\u003c\/strong\u003e \u0026lt;0.5dB\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Calibration Optical Fiber - 200µm, 10m\u003c\/h2\u003e\n\u003cp\u003eThis 10m Shelyak calibration fiber uses a 200µm core diameter, the standard for delivering a clean calibration signal in fiber-fed Echelle systems like the eShel and Whoppshel. With a numerical aperture of 0.22 and rugged stainless steel protection, it ensures a stable and robust connection from your calibration module to the \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e's FIGU. Its design guarantees near 100% transmission along the fiber itself, with total attenuation kept below 0.5dB—a figure that remains consistent even for longer 20m versions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-Fidelity Signal Path: The 200µm Core for eShel Systems\u003c\/h3\u003e\n\u003cp\u003eEngineered specifically for astronomical \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e, this fiber's 200µm core provides an optimal light path from a calibration lamp to the spectrograph. The industry-standard FC-FC connectors ensure a secure, threaded coupling that minimizes signal loss at the junction points. The entire length is protected by a flexible stainless steel sheath, safeguarding the delicate fiber from being crushed or kinked in an active observatory environment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eConsistent Signal Strength: \u0026lt;0.5dB Attenuation Across All Lengths\u003c\/h3\u003e\n\u003cp\u003eA key characteristic of this fiber is that signal loss is dominated by the connectors, not the length of the cable. Transmission through the fiber itself is close to 100%, resulting in total attenuation of less than 0.5dB. This means you can run this 10m cable, or even a longer 20m version, without any practical degradation in your calibration lamp's signal intensity, giving you greater flexibility in positioning your equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary use for the Shelyak 200µm calibration fiber?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis fiber is designed to conduct light from a calibration module (like a Thorium-Argon or Tungsten lamp) to the Fiber Injection \u0026amp; Guiding Unit (FIGU) of a spectroscope. It is specifically optimized for Shelyak's own eShel and Whoppshel Echelle spectroscopy systems.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIf I place my eShel calibration unit 15 meters away, will a longer fiber have more signal loss than this 10m fiber?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, you should not see any practical difference in signal strength. Attenuation is less than 0.5dB regardless of length (up to 20m). This is because the minimal signal loss occurs at the FC-FC connector junctions, not along the highly transmissive fiber itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the core diameter of this Shelyak fiber 200µm?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e200µm core diameter\u003c\/strong\u003e is matched to the optical design of spectrographs like the eShel. This ensures the maximum amount of light from the calibration lamp is efficiently captured and injected into the spectrograph for accurate wavelength calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a Whoppshel spectrograph. Is this 10m calibration fiber the correct one to use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. This 200µm calibration fiber is explicitly designed and optimized for use with both the Shelyak eShel and Whoppshel spectroscopy systems, ensuring full compatibility and reliable operation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are FC-FC connectors on this 200µm fiber?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eFC connectors\u003c\/strong\u003e are a standard for high-quality optical fibers. They provide a secure, threaded connection that ensures precise alignment of the fiber cores, which minimizes signal loss and prevents accidental disconnection during an observing session.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the stainless steel protection on the Shelyak calibration fiber do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe stainless steel sheath acts as a durable armor for the delicate glass fiber inside. It protects the fiber from being crushed by equipment, kinked from tight bends, or otherwise damaged, ensuring the long-term reliability and signal integrity of your calibration setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Diameter\u003c\/td\u003e\n\u003ctd\u003e200µm (for calibration fibers)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAvailable Lengths\u003c\/td\u003e\n\u003ctd\u003e10 or 20 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection\u003c\/td\u003e\n\u003ctd\u003eStainless steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector Type\u003c\/td\u003e\n\u003ctd\u003eFC-FC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumerical Aperture (NA)\u003c\/td\u003e\n\u003ctd\u003e0.22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttenuation\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.5dB (valid for 5, 10, or 20m lengths)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTransmission Note\u003c\/td\u003e\n\u003ctd\u003eLosses mainly occur at connector junctions. The transmission of the fiber itself is close to 100% over these lengths.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits spectrograph\u003c\/td\u003e\n\u003ctd\u003eeShel, Whoppshel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCalibration Optical Fiber (200µm, 10m)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943036875037,"sku":"SHK-PF0019","price":731.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Calibration-optical-fiber-200-m-20m-1_e6df1f51-e1ad-47b3-934d-72af6006da21.jpg?v=1789616069"},{"product_id":"shelyak-pf0021v","title":"Shelyak LISA Spectroscope (VIS)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eDesigned for faint object spectroscopy at low resolution\u003c\/li\u003e\n\u003cli\u003eResolving power of R~1,000 with the included 23 µm slit\u003c\/li\u003e\n\u003cli\u003eOptimized for f\/5 optical systems\u003c\/li\u003e\n\u003cli\u003eCovers the visible spectrum from 400 nm to 700 nm\u003c\/li\u003e\n\u003cli\u003eMirror slit design with C-mount port for precise autoguiding\u003c\/li\u003e\n\u003cli\u003eIncludes four interchangeable slits: 15, 19, 23, and 35 µm\u003c\/li\u003e\n\u003cli\u003e1.4 kg without camera\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak LISA Spectroscope (VIS)\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak LISA Spectroscope is a high-luminosity instrument dedicated to the \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e of faint objects, weighing just 1.4 kg without a camera. Its fast f\/5 optical system delivers a resolving power of approximately 1,000 using the 23 µm slit, covering a spectral range from 400 nm to 700 nm. The design incorporates a 4 mm long mirrored slit for precise guiding and is supplied with an interchangeable slit (15, 19, 23 and 35 µm) to favour resolution or brightness as needed.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eThe Shelyak LISA (VIS): A Spectroscope for f\/5 Systems\u003c\/h3\u003e\n\u003cp\u003eThe LISA is engineered specifically for capturing spectra of faint and diffuse deep-sky objects where high light-gathering power is more critical than ultra-high resolution. It is the most sensitive instrument in Shelyak's range, dedicated to comets, novae, supernovae, faint variable stars, the redshift of distant galaxies or quasars and the confirmation of planetary nebulae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAn f\/5 Design with a 0.68x Internal Reduction\u003c\/h3\u003e\n\u003cp\u003eThe optical path of the LISA begins with light from an f\/5 telescope beam passing through the slit. A \u003ca href=\"\/en-int\/collections\/collimation-tools\"\u003ecollimator\u003c\/a\u003e with a 130mm focal length transforms this light into a parallel beam before it strikes the \u003ca href=\"\/en-int\/collections\/gratings-and-slits\"\u003ediffraction grating\u003c\/a\u003e. After dispersion, an 88mm objective lens focuses the spectrum onto the camera sensor. The slit image is therefore multiplied by 88\/130 = 0.68 on the sensor. Shelyak credits this internal reducer and the low resolution for the LISA's sensitivity on faint objects.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eR~1,000 Resolving Power from 400 nm to 700 nm\u003c\/h3\u003e\n\u003cp\u003eWith the 23 µm slit, the LISA reaches a resolving power (R) of about 1,000; R ranges from about 600 to 1,000 depending on slit and mode. The VIS (Visible) configuration covers 400 nm to 700 nm, and the range even extends into the near UV and near IR.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 4 mm Mirrored Slit with Four Interchangeable Widths\u003c\/h3\u003e\n\u003cp\u003eThe LISA's slit assembly is central to its functionality. The slit is a mirror slit: the field around it is sent to the \u003ca href=\"\/en-int\/collections\/guide-cameras\"\u003eguiding camera\u003c\/a\u003e port, so you can position the target accurately on the 4 mm long slit and hold it there.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded Slits:\u003c\/strong\u003e The standard interchangeable slit carries 15, 19, 23 and 35 µm widths, so you can favour resolution or brightness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutoguiding Port:\u003c\/strong\u003e The reflected field of view is directed to a C-mount port with a 17.5 mm backfocus, where a guiding camera (not supplied) lets you autoguide the telescope.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Slits:\u003c\/strong\u003e For specialized applications, Shelyak offers optional wide slits and photometric slits.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMatching the LISA to Your Telescope's Focal Ratio\u003c\/h3\u003e\n\u003cp\u003eTo achieve maximum throughput, the LISA is designed to be fed by an f\/5 light cone. You can install it on telescopes that are natively f\/5. On \u003ca href=\"\/en-int\/collections\/schmidt-cassegrain-telescopes\"\u003eSchmidt-Cassegrain\u003c\/a\u003e or \u003ca href=\"\/en-int\/collections\/ritchey-chretien-and-dall-kirkham\"\u003eRitchey-Chrétien\u003c\/a\u003e telescopes, generally f\/10 or f\/8, use a \u003ca href=\"\/en-int\/collections\/flatteners-and-reducers\"\u003efocal reducer\u003c\/a\u003e to bring the focal ratio close to f\/5. A Schmidt-Cassegrain takes an f\/6.3 reducer and an SCT \u003ca href=\"\/en-int\/collections\/imaging-adapters\"\u003eT-adapter\u003c\/a\u003e, with a longer spacing between the LISA and the reducer to reach f\/5.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eM42, C-Mount, and 2\" Nosepiece Connections\u003c\/h3\u003e\n\u003cp\u003eThe LISA provides standardized mechanical interfaces for easy integration into your existing setup. \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTelescope Connection:\u003c\/strong\u003e The instrument includes a 2\" nosepiece for use in standard 2\" focusers. The nosepiece can be removed to reach a female T-mount thread (M42x0.75mm). For a Schmidt-Cassegrain (2\" external thread) you need the optional BA0027 variable T-adapter.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImaging Camera Connection:\u003c\/strong\u003e The acquisition camera attaches via a male M42x0.75 T-thread. The backfocus is 54.9 mm; the manual says the T-mount thread can also take a DSLR with a T-ring.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGuiding Camera Connection:\u003c\/strong\u003e The \u003ca href=\"\/en-int\/collections\/autoguiding\"\u003eautoguider\u003c\/a\u003e port uses a standard C-mount interface with a 17.5 mm backfocus.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eSensor Matching for Acquisition and Guiding\u003c\/h3\u003e\n\u003cp\u003eThe acquisition camera mounts on the T-mount thread at 54.9 mm backfocus, and the guiding camera (not supplied) on the C-mount port at 17.5 mm. The manual adds that all Lhires III camera adapters fit the LISA, since both instruments have the same spectrum port backfocus.\u003c\/p\u003e\n\u003cp\u003eThe LISA includes two adapter rings to help achieve correct spacing for cameras with different backfocus requirements. For ATIK cameras you need the 13mm ring (13mm mechanical backfocus), supplied with the LISA; the second adapter is for cameras with 17mm backfocus.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eIntegrated Features for High-Precision Wavelength Calibration\u003c\/h3\u003e\n\u003cp\u003eAccurate scientific results depend on precise wavelength calibration and flat-fielding. Light can be injected through a calibration window (tungsten lamp, neon lamp, energy saver lamp), and a white screen controlled by an electro-magnet can be moved to send this light to the slit; when it is in front of the slit, it stops starlight entering the \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e. The optional calibration module adds an Argon\/Neon lamp, with many emission lines over the whole LISA range, and a tungsten lamp for flats.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFrom Acquisition to Final Spectrum with Demetra\u003c\/h3\u003e\n\u003cp\u003eShelyak provides the free Demetra software, and the LISA manual also names IRIS, AudeLA, RSpec and VisualSpec. The process includes standard steps like bias and dark subtraction, flat-fielding to correct for instrumental response, and geometric correction of the 2D spectrum. Then come sky background subtraction, extraction of the 1D profile (the manual describes optimal extraction) and wavelength calibration with your reference lamp spectrum. The final step is to apply an instrumental response correction, typically derived from observing a reference star of a known spectral type, to produce a scientifically valid spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eContributing to Novae, Supernovae, and Comet Research\u003c\/h3\u003e\n\u003cp\u003eThe LISA is a tool for collaboration between amateur and professional astronomers: novae, supernovae, comets, symbiotic stars and the confirmation of planetary nebulae. Many scientific publications are based on LISA observations, with examples such as an ATEL on H-alpha in SS433 and spectroscopy of classical novae. Advice and examples are shared on the spectro-L discussion list and the ARAS forum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 1.4 kg Instrument Ready for the Field\u003c\/h3\u003e\n\u003cp\u003eThe LISA weighs 1.4 kg without a camera; the manual reminds you to check the total weight capacity of your mount. Focusing can be started during the day with an energy-saver lamp or a neon lamp, as the manual describes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of objects is the Shelyak LISA Spectroscope designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eShelyak dedicates the LISA to faint objects. These include \u003cstrong\u003enovae, supernovae, comets, faint variable stars, planetary nebulae, distant galaxies, and quasars\u003c\/strong\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat telescope do I need to use the Shelyak LISA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LISA is an \u003cstrong\u003ef\/5\u003c\/strong\u003e instrument. It can be installed on telescopes that are natively f\/5, or on f\/10 or f\/8 Schmidt-Cassegrain and Ritchey-Chrétien telescopes with a \u003cstrong\u003efocal reducer\u003c\/strong\u003e that brings the focal ratio close to f\/5.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I keep a star centered on the Shelyak LISA's slit for long exposures?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIts \u003cstrong\u003emirror slit\u003c\/strong\u003e reflects the starfield around the slit to a guiding camera, so you can see the target for initial positioning. The guiding camera (not supplied) attaches to the \u003cstrong\u003eC-mount guide port\u003c\/strong\u003e (17.5 mm backfocus) and lets you autoguide the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I change the spectral resolution of the Shelyak LISA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The resolution depends on the slit width. It includes an interchangeable slit holder with four slits: \u003cstrong\u003e15, 19, 23, and 35 µm\u003c\/strong\u003e. Using a narrower slit (like 15 µm) provides higher resolution for separating fine spectral details on brighter targets. Using a wider slit (like 35 µm) allows more light in, increasing sensitivity for very faint objects at the cost of lower resolution.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use the Shelyak LISA on a faint supernova in a galaxy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a faint, distant target like a supernova, you would prioritize light gathering. You would select one of the wider slits, likely the \u003cstrong\u003e23 µm or 35 µm\u003c\/strong\u003e, to maximize throughput. With the guiding camera on the mirror slit you find the supernova in its galaxy, place it on the slit and autoguide to hold it there during the exposures.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Shelyak LISA with my 8\" f\/10 SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but you will need a focal reducer to achieve optimal results. An f\/10 beam is too slow for the LISA's f\/5 design. The manual suggests an \u003cstrong\u003ef\/6.3 reducer\u003c\/strong\u003e with an SCT T-adapter, spaced further from the LISA to reach f\/5. To mount on the SCT's 2\" external thread you need the optional BA0027 variable T-adapter.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the ~1,000 resolving power of the Shelyak LISA let me do?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWith R~1,000 across 400 to 700 nm, you record the whole visible spectrum of faint targets in one shot: the Balmer lines of stars, the main emission lines of nebulae (such as H-alpha, H-beta and [O III]) and the broad lines of novae and supernovae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the internal calibration screen on the Shelyak LISA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe internal screen allows you to take calibration frames (flats with a tungsten lamp, and wavelength references with a Neon\/Argon lamp) without removing the spectroscope from the telescope. An electro-magnet moves a white screen in front of the slit; it stops starlight and sends the calibration light into the spectrograph. The calibration connector is 12V (2.5mm, positive in the center).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat cameras are recommended for the Shelyak LISA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo specific camera is named for the LISA. The imaging port is a T-mount thread with 54.9 mm backfocus; the guide port is C-mount with 17.5 mm backfocus. The LISA includes 13 mm and 17 mm adapters to accommodate cameras with different backfocus needs (the 13 mm ring is for ATIK cameras).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I process the data from the Shelyak LISA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eShelyak provides \u003cstrong\u003eDemetra\u003c\/strong\u003e, and the LISA manual names IRIS, AudeLA, \u003cstrong\u003eRSpec\u003c\/strong\u003e and \u003cstrong\u003eVisualSpec\u003c\/strong\u003e. The general process involves:\n\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003ePre-processing:\u003c\/strong\u003e Calibrating raw images with bias, dark, and flat frames.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeometric Correction:\u003c\/strong\u003e Correcting for any rotation or tilt in the 2D spectrum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtraction:\u003c\/strong\u003e Subtracting the sky background and extracting the 1D spectral profile from the 2D image.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalibration:\u003c\/strong\u003e Applying a wavelength solution using a spectrum from a known reference lamp (e.g., Neon).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstrumental Response Correction:\u003c\/strong\u003e Using a reference star to correct the instrumental response.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Shelyak LISA difficult to set up for a first-time user?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile spectroscopy involves more steps than standard imaging, the manual walks through the tuning. Focusing can start in daylight with an energy-saver lamp or a neon calibration lamp.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSlit Length\u003c\/td\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.4 kg (without camera)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eResolving Power\u003c\/td\u003e\n\u003ctd\u003e~1,000 (with 23 µm slit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpectral Range\u003c\/td\u003e\n\u003ctd\u003e400 - 700 nm (extends to near-UV\/IR)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAperture\u003c\/td\u003e\n\u003ctd\u003ef\/5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIncluded Slits\u003c\/td\u003e\n\u003ctd\u003e15, 19, 23, 35 µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTelescope Connection\u003c\/td\u003e\n\u003ctd\u003e2\" Nosepiece or M42x0.75 T-thread (female)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImaging Camera Connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 T-thread (male)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eImaging Camera Backfocus\u003c\/td\u003e\n\u003ctd\u003e54.9 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuiding Camera Connection\u003c\/td\u003e\n\u003ctd\u003eC-mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eGuiding Camera Backfocus\u003c\/td\u003e\n\u003ctd\u003e17.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCamera-Side Connection\u003c\/td\u003e\n\u003ctd\u003eM42x0.75 (T2) male\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eLISA Spectroscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eInterchangeable Slit Holder with 4 Slits (15, 19, 23, 35µm)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e2\" Telescope Nosepiece\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAdapters for 13mm and 17mm back focus cameras\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 2\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_LISA_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak LISA Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943037530397,"sku":"SHK-PF0021V","price":7432.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-LISA-Spectroscope-VIS-1_8002f53b-c8de-4ff5-ad2b-60eccfc54f16.jpg?v=1789616078"},{"product_id":"shelyak-pf0023","title":"Shelyak Handheld Spectro","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eConvenient Dimensions: 115 x 25mm\u003c\/li\u003e\n\u003cli\u003eVisual Use Only for Bright Light Sources\u003c\/li\u003e\n\u003cli\u003eIdeal for Educational and Classroom Use\u003c\/li\u003e\n\u003cli\u003eReveals Emission and Absorption Spectra\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eHandheld Spectro\u003c\/h2\u003e\n\u003cp\u003eThe Handheld Spectro reveals the hidden fingerprints of light in a compact, easy-to-use 115 x 25mm instrument designed for direct visual observation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eExploring Light with a 115mm Handheld Spectroscope\u003c\/h3\u003e\n\u003cp\u003eThis simple yet effective tool makes the physics of light tangible. By looking through the \u003ca href=\"\/en-int\/collections\/eyepieces\"\u003eeyepiece\u003c\/a\u003e, you can split the light from any bright source into its constituent colors, revealing a unique spectral signature. It's a fun, engaging way to see the science behind everyday objects.\u003c\/p\u003e\n\u003cp\u003eDesigned specifically for educational settings and curious minds, this spectroscope is intended for terrestrial sources only. Its primary limitation is that it is not sensitive enough for astronomical targets. It excels, however, at demonstrating core scientific principles in a classroom or at home.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eClassroom Science:\u003c\/strong\u003e Use it to show the difference between the continuous spectrum of an incandescent bulb and the sharp emission lines of a neon or mercury lamp.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEveryday Exploration:\u003c\/strong\u003e Analyze the light from flames, streetlights, or LCD screens to see how their spectra differ.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSunlight Analysis:\u003c\/strong\u003e Observe the solar spectrum (via indirect light, never look directly at the Sun) to see the famous Fraunhofer absorption lines.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat can I see with the Handheld Spectro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Handheld Spectro allows you to see the color spectrum of bright, terrestrial light sources. You can observe the continuous rainbow from sunlight or an incandescent bulb, or the distinct, bright emission lines from sources like neon lamps, streetlights, and flames. It reveals the unique \"fingerprint\" of each light source.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Handheld Spectro to see the spectrum of the Sun?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but with extreme caution. \u003cstrong\u003eNever look directly at the Sun through any optical instrument.\u003c\/strong\u003e To safely observe the solar spectrum, point the spectroscope at a white surface illuminated by bright sunlight, such as a piece of paper on the ground. This will allow you to see the Sun's continuous spectrum crossed by dark Fraunhofer absorption lines.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the spectrum of a fluorescent lamp look like with the Handheld Spectro?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA fluorescent lamp will show a unique spectrum. Instead of a smooth, continuous rainbow, you will see several sharp, bright emission lines (often green and blue from mercury vapor) superimposed on a fainter continuous background. This is distinctly different from the spectrum of an incandescent bulb.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy isn't the Handheld Spectro suitable for observing stars?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is a simple, visual-only instrument designed for bright light sources. Stars, while bright to our eyes, are point sources of light that are far too faint for a basic handheld spectroscope to gather enough light to produce a visible spectrum. Astronomical \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e requires a telescope and more sensitive, specialized equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the Handheld Spectro a good tool for a classroom science lesson?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. It is an excellent and affordable tool for educational purposes. It provides a direct, hands-on demonstration of light properties, emission vs. absorption spectra, and how different elements produce different spectral signatures. It is perfect for physics or chemistry classes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Handheld Spectro require any batteries or power?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The Handheld Spectro is a purely passive optical device. It splits light optically and requires no power source to operate, making it incredibly simple and reliable for use anywhere.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e115 x 25mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIntended Use\u003c\/td\u003e\n\u003ctd\u003eVisual observation of bright terrestrial light sources\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAstronomical Use\u003c\/td\u003e\n\u003ctd\u003eNot suitable for stars or faint objects\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eHandheld Spectroscope\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943038710045,"sku":"SHK-PF0023","price":192.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Handheld-Spectro-1_bfa421ec-c781-4feb-9020-bbd8b9478fba.jpg?v=1789616086"},{"product_id":"shelyak-pf0045","title":"Shelyak Spox Module","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eRemote control for spectrograph calibration lamps\u003c\/li\u003e\n\u003cli\u003eCompatible with Alpy 600, LISA, LHIRES III and the non-motorized UVEX\u003c\/li\u003e\n\u003cli\u003eDual control modes: manual push-buttons and computer USB\u003c\/li\u003e\n\u003cli\u003eFull automation support via ASCOM drivers\u003c\/li\u003e\n\u003cli\u003eOptional 0.8m and 5m spectrograph connection cables\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Spox Module\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Spox Module provides dedicated remote control over the flat and calibration lamps of the \u003ca href=\"\/en-int\/products\/shelyak-alpy-600-spectroscope\"\u003eAlpy 600\u003c\/a\u003e and LISA calibration modules, the LHIRES III and the non-motorized UVEX, streamlining the critical process of data acquisition. This controller simplifies taking flat-field and spectral calibration frames, with optional 0.8m and 5m cables available to integrate the module cleanly into your specific setup.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRemote Calibration Control for Alpy 600, LISA, and LHIRES III\u003c\/h3\u003e\n\u003cp\u003eThe Spox Module manages your \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e's two essential calibration sources: the tungsten lamp for flat-field frames and the Neon\/Argon lamp for wavelength calibration. By centralizing this control, you eliminate the need to manually access the spectrograph, reducing the risk of disturbing your setup between science exposures and calibration sequences. A red alarm LED on the unit indicates if one of the lamps is faulty (lamp failure detection is not available for the LISA calibration module).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eManual and ASCOM Control for Field or Observatory Use\u003c\/h3\u003e\n\u003cp\u003eEngineered for two distinct operational scenarios, the Spox Module adapts to your workflow. For quick, computer-free operation in the field, tactile push-buttons on the housing allow you to toggle each lamp directly. For automated or remote observatory use, a USB connection enables full computer control via dedicated software (for Windows or Linux) or integration into sequencing applications using its ASCOM driver.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFlexible Cabling with 0.8m and 5m Options\u003c\/h3\u003e\n\u003cp\u003eThe Spox connects to your spectrograph via a specific cable, available separately in 0.8m or 5m lengths to suit your configuration. The shorter 0.8m cable is ideal for mounting the Spox directly on the telescope assembly, while the 5m cable allows you to place the controller on a \u003ca href=\"\/en-int\/collections\/tripods-and-piers\"\u003epier\u003c\/a\u003e or other nearby location. Please note that the Spox Module requires a 12V \u003ca href=\"\/en-int\/collections\/power-accessories\"\u003epower supply\u003c\/a\u003e, which is not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the Spox Module control on my Shelyak spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Spox Module remotely controls the power to your spectrograph's calibration lamps (in the calibration module on the Alpy 600 and LISA). This includes the \u003cstrong\u003etungsten lamp\u003c\/strong\u003e used for acquiring flat-field images and the \u003cstrong\u003eNeon\/Argon lamp\u003c\/strong\u003e used for wavelength calibration.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I power the Spox Module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou will need to provide your own \u003cstrong\u003e12V DC power supply\u003c\/strong\u003e. The Spox Module does not draw power over USB and the power supply is not included with the unit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the Spox Module without a computer?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Spox Module has physical \u003cstrong\u003epush-buttons\u003c\/strong\u003e on the case that allow you to turn the flat and calibration lamps on and off manually. This is ideal for use in the field when you don't want to connect to a laptop.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat software do I need to control the Spox Module from my PC?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou have two options for computer control via USB. You can use Shelyak's dedicated application, available for both Windows and Linux, or you can use the provided \u003cstrong\u003eASCOM driver\u003c\/strong\u003e to integrate the Spox Module into popular automation and sequencing software.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have a LHIRES III on a permanent pier and want to control it from my warm room. Is the Spox Module suitable?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. This is a perfect use case for the Spox Module. By connecting it to your LHIRES III with the optional \u003cstrong\u003e5m cable\u003c\/strong\u003e and to your observatory computer via USB, you can fully automate your calibration frames as part of your imaging sequence without ever having to go outside.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm using an Alpy 600 in the field for a variable star project. How does the Spox Module help?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor field work, the Spox Module's manual push-button control is its key advantage. After your science observation of a star like Algol (Beta Persei), you can immediately trigger the calibration and flat lamps with the press of a button, ensuring you capture essential calibration data with your Alpy 600 without needing to boot up a computer.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatible Spectrographs\u003c\/td\u003e\n\u003ctd\u003eAlpy 600 (calibration module), LISA (calibration module), LHIRES III (shipped since 2016 or with calibration upgrade kit), UVEX (non-motorized)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Interface\u003c\/td\u003e\n\u003ctd\u003eManual Push-Button, USB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSoftware Support\u003c\/td\u003e\n\u003ctd\u003eDedicated Application (Windows\/Linux), ASCOM Driver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e12V DC, 1A minimum (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOptional Cable Lengths\u003c\/td\u003e\n\u003ctd\u003e0.8m, 5m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eTiny XLR 4-pin, USB, 5.5 mm DC (centre positive)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSPOX control box\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eUSB cable\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDocumentation flyer\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e4-pin cable 0.8 m or 5 m (depending on option)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eAlpy \u0026amp; LISA adapter cable (depending on option)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943039004957,"sku":"SHK-PF0045","price":494.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Spox-Module-for-Lhires-III-with-5m-cable-1_2a8f91be-94ec-4011-9c60-94599772f4dc.jpg?v=1789616094"},{"product_id":"shelyak-pf0049","title":"Shelyak 50µm Object Fiber - 5m","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e50µm Core Diameter Object Fiber\u003c\/li\u003e\n\u003cli\u003e5m Cable Length\u003c\/li\u003e\n\u003cli\u003eFC Type Connectors (Both Ends)\u003c\/li\u003e\n\u003cli\u003e380nm - 800nm+ Wavelength Range\u003c\/li\u003e\n\u003cli\u003eNumerical Aperture: 0.22\u003c\/li\u003e\n\u003cli\u003eLess than 0.5dB Attenuation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003e50µm Object Fiber - 5m\u003c\/h2\u003e\n\u003cp\u003eThis 5m Shelyak object fiber features a 50µm core optimized for high-resolution \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e from 380nm to 800nm and beyond. With a numerical aperture of 0.22 and industry-standard FC connectors, it ensures efficient light injection from your telescope's FIGU to an eShel \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e while maintaining signal integrity with less than 0.5dB of attenuation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-OH 50µm Core for 380-800nm Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eThis fiber uses \"High-OH\" material, which provides excellent transmission in the blue part of the spectrum, making it ideal for UV-VIS spectroscopy across its full 380nm to 800nm+ operational range. The 50µm core diameter is the standard for the \"Object\" fiber in Shelyak's eShel system, precisely carrying the starlight from the telescope to the spectrograph for analysis. Signal loss is kept below 0.5dB, as attenuation primarily occurs at the connectors, not along the fiber's length.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eFC Connectors and 0.22 NA for eShel System Integration\u003c\/h3\u003e\n\u003cp\u003eEngineered specifically for systems like the eShel, this fiber is terminated with robust FC-type connectors on both ends for a secure and repeatable connection between your Fiber Injection and Guiding Unit (FIGU) and the spectroscope. The 0.22 numerical aperture (NA) is matched to astronomical instrumentation to ensure efficient light coupling from the telescope's focal plane into the fiber core, maximizing throughput for faint targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Shelyak 50µm object fiber in an eShel system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is the primary \"Object\" fiber, designed to transmit the starlight collected by your telescope to the spectroscope. It physically connects the Fiber Injection and Guiding Unit (FIGU) at the telescope to the eShel spectrograph, which may be located several meters away.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is this 50µm fiber described as \"High-OH\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003eHigh-OH\u003c\/strong\u003e refers to the fiber's material composition, which offers superior transmission in the blue and ultraviolet parts of the spectrum. This makes the fiber highly effective for spectroscopy in the \u003cstrong\u003e380nm to 800nm\u003c\/strong\u003e range, capturing critical spectral lines that might be attenuated by standard fibers.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the 5m length of this 50µm fiber cause more signal loss than a shorter one?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, the signal loss will be virtually identical. The specified attenuation of \u003cstrong\u003e\u0026lt;0.5dB\u003c\/strong\u003e is dominated by losses at the FC connector junctions, not by the length of the fiber itself. Transmission through the fiber is near 100%, so 5m, 10m, or 20m versions of this fiber will have comparable performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this 50µm fiber to study the Balmer series in Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. Vega's prominent hydrogen Balmer absorption lines (like H-beta at 486nm and H-gamma at 434nm) fall squarely within the optimal \u003cstrong\u003e380nm to 800nm\u003c\/strong\u003e range of this High-OH fiber. It will efficiently transmit the light needed to capture a high-quality spectrum of these features with an eShel system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the 50µm core diameter of this object fiber affect my spectral resolution with an eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003e50µm core diameter\u003c\/strong\u003e acts as the entrance slit for the spectrograph in a fiber-fed system like the eShel. This diameter is a key factor in determining the ultimate resolving power of the instrument. The eShel is designed around this specific fiber diameter to achieve its high-resolution capabilities, so using this fiber is critical for obtaining the expected performance.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat are FC connectors and why are they used on this Shelyak 50µm fiber?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFC connectors are a type of fiber optic connector known for their secure, screw-on coupling mechanism. They are used in scientific and telecommunications applications where a stable, vibration-resistant connection is critical to prevent signal loss or disconnection, which is essential for long-exposure astronomical spectroscopy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003e50µm Object Fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e5m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Diameter\u003c\/td\u003e\n\u003ctd\u003e50µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectors\u003c\/td\u003e\n\u003ctd\u003eFC type (both ends)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumerical Aperture (NA)\u003c\/td\u003e\n\u003ctd\u003e0.22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Type\u003c\/td\u003e\n\u003ctd\u003eHigh-OH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e380nm to 800nm+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttenuation\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.5dB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits spectrograph\u003c\/td\u003e\n\u003ctd\u003eeShel, Whoppshel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e50µm Object Fiber (5m)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943039201565,"sku":"SHK-PF0049","price":313.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-50-m-object-fiber-5m-1_badbcc0c-6a97-4719-8759-baab1be1ef34.jpg?v=1789616102"},{"product_id":"shelyak-pf0050","title":"Shelyak 50µm Object Fiber - 10m","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e10m Fiber Length\u003c\/li\u003e\n\u003cli\u003e50µm Core Diameter\u003c\/li\u003e\n\u003cli\u003eHigh-OH Fiber for UV-VIS Transmission (380-800nm)\u003c\/li\u003e\n\u003cli\u003eFC-type Connectors (Both Ends)\u003c\/li\u003e\n\u003cli\u003e\u0026lt;0.5dB Signal Attenuation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak 50µm Object Fiber - 10m\u003c\/h2\u003e\n\u003cp\u003eThis Shelyak 10m object fiber uses a 50µm core and High-OH glass to ensure maximum signal transmission from 380nm to over 800nm for high-resolution \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e. Signal loss is kept below 0.5dB, as attenuation occurs almost exclusively at the FC-type connectors, while the fiber itself maintains nearly 100% transmission. The numerical aperture of 0.22 is optimized for coupling starlight from a telescope's focal plane into an eShel \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-OH Fiber for UV-VIS Spectroscopy: 380-800nm Range\u003c\/h3\u003e\n\u003cp\u003eThis is not a generic telecommunications fiber. Shelyak uses a specific \"High-OH\" fiber with a 50µm core, which provides superior transmission in the blue and ultraviolet portions of the spectrum. This allows you to capture critical spectral features across a wide 380nm to 800nm+ band, from the Calcium H \u0026amp; K lines in the violet to the Hydrogen-alpha line in the deep red.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMinimal Signal Loss: \u0026lt;0.5dB Attenuation over 10m\u003c\/h3\u003e\n\u003cp\u003eWhen working with faint stellar signals, every photon counts. The fiber itself has a transmission rate close to 100%, meaning the 10m length does not degrade the signal. The only meaningful loss, rated at less than 0.5dB, occurs at the FC-type connector junctions, ensuring your data's integrity between the telescope and the spectroscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is this Shelyak 50µm fiber called an \"Object\" fiber?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eIn a fiber-fed spectroscope system like the Shelyak eShel, two fibers are used. The \u003cstrong\u003e50µm \"Object\" fiber\u003c\/strong\u003e carries the starlight from the telescope to the spectroscope. A second, larger fiber is often used for calibration, carrying light from a calibration lamp. This fiber is specifically designed for the primary starlight signal path.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the advantage of a \"High-OH\" fiber for my spectroscopy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA \u003cstrong\u003eHigh-OH (high hydroxyl)\u003c\/strong\u003e fiber has excellent transmission characteristics in the ultraviolet and blue parts of the spectrum, down to 380nm. This is critical for astrophysical studies, such as analyzing the Balmer series lines in A-type stars or the prominent Calcium H and K lines, which are found in the violet end of the spectrum.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I lose significant signal with this 10m Shelyak fiber compared to a shorter one?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The fiber material itself has a transmission close to 100%, regardless of length up to several dozen meters. The signal attenuation of \u003cstrong\u003e\u0026lt;0.5dB\u003c\/strong\u003e is almost entirely from coupling losses at the connectors. A 5m, 10m, or 20m Shelyak fiber will deliver virtually identical signal strength to your spectroscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs this 50µm fiber suitable for capturing the full spectrum of Vega (Alpha Lyrae)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. Vega is an A-type star with very prominent hydrogen absorption lines (the Balmer series) across the visible spectrum. The \u003cstrong\u003e380-800nm\u003c\/strong\u003e range of this High-OH fiber is ideal for capturing everything from the H-beta line (486nm) in the blue-green to H-alpha (656nm) in the red, making it perfect for studying such stars with an eShel system.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this Shelyak fiber to analyze emission nebulae like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The excellent transmission of this fiber makes it well-suited for analyzing the distinct emission lines of nebulae. Key lines for objects like the Orion Nebula (M42) are well within its range, including Hydrogen-alpha (656nm), Hydrogen-beta (486nm), and the two Oxygen-III lines (496nm and 501nm).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the NA=0.22 numerical aperture mean for my eShel setup?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe \u003cstrong\u003eNumerical Aperture (NA) of 0.22\u003c\/strong\u003e defines the acceptance cone of light the fiber can efficiently capture. It's designed to match the focal ratio of the telescope beam as it enters the Fiber Injection and Guiding Unit (FIGU). This ensures that the starlight is coupled into the 50µm fiber core with minimal loss, maximizing the signal sent to the spectroscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003eObject Fiber for Spectroscopy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e10 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Diameter\u003c\/td\u003e\n\u003ctd\u003e50µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectors\u003c\/td\u003e\n\u003ctd\u003eFC type (both ends)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumerical Aperture (NA)\u003c\/td\u003e\n\u003ctd\u003e0.22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Type\u003c\/td\u003e\n\u003ctd\u003eHigh-OH (Optimized for UV-VIS)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e380nm - 800nm+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSignal Attenuation\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.5dB (at connectors)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Transmission\u003c\/td\u003e\n\u003ctd\u003eApproximately 100%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits spectrograph\u003c\/td\u003e\n\u003ctd\u003eeShel, Whoppshel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e50µm Object Fiber with FC Connectors\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943039496477,"sku":"SHK-PF0050","price":479.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-50-m-object-fiber-5m-1_8ffffce0-3b68-41be-b4e8-23f9706a67ad.jpg?v=1789616110"},{"product_id":"shelyak-pf0051","title":"Shelyak 50µm Object Fiber - 20m","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003e50µm Core Diameter\u003c\/li\u003e\n\u003cli\u003e20 Meter Length\u003c\/li\u003e\n\u003cli\u003eLess than 0.5dB Attenuation\u003c\/li\u003e\n\u003cli\u003e380-800nm Spectral Range\u003c\/li\u003e\n\u003cli\u003eFC-Type Connectors (Both Ends)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak 50µm Object Fiber - 20m\u003c\/h2\u003e\n\u003cp\u003eThis 20-meter Shelyak object fiber uses a 50µm core to transmit starlight from your telescope's Fiber Injection and Guiding Unit (FIGU) directly to a compatible \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectroscope\u003c\/a\u003e like the eShel. Its High-OH fiber construction is optimized for the 380 to 800nm spectral range, while the 0.22 numerical aperture efficiently couples light into the system with less than 0.5dB of total attenuation.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 50µm Core for High-Resolution eShel Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eEngineered as the primary light path for Shelyak's eShel system, this fiber's 50µm core diameter is precisely matched to the instrument's design for optimal resolution. The 20-meter length provides ample flexibility for permanent observatory setups where the telescope and spectroscope may be positioned far apart. Both ends are terminated with robust FC-type connectors for a secure, repeatable connection between the FIGU and the spectrograph.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eHigh-OH Fiber: \u0026lt;0.5dB Attenuation from 380-800nm\u003c\/h3\u003e\n\u003cp\u003eThis fiber uses \"High-OH\" glass, which enhances transmission in the blue and ultraviolet portions of the spectrum, making it effective from 380nm to 800nm and beyond. The total signal loss is rated at less than 0.5dB, a figure dominated by the connection points rather than the fiber itself. This means transmission is near 100% along the 20-meter length, ensuring that valuable photons from your target reach the sensor.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the purpose of the Shelyak 50µm object fiber in an eShel system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis is the \"object\" fiber, designed to carry the starlight collected by the telescope to the spectroscope. It physically connects the Fiber Injection and Guiding Unit (FIGU) at the telescope to the main eShel instrument, which can be located up to 20 meters away.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy is the attenuation of the 20m fiber rated at \u0026lt;0.5dB, the same as shorter fibers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor modern optical fibers of this length, signal loss along the glass itself is negligible (close to 100% transmission). The vast majority of the \u0026lt;0.5dB attenuation occurs at the two FC connector junctions. Because the number of connections is the same regardless of length, the total attenuation remains constant across 5m, 10m, and 20m versions.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this 50µm object fiber to study the Balmer series in Vega (Alpha Lyrae) with an eShel?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The fiber's High-OH glass provides excellent transmission from 380nm to 800nm. This range comfortably covers the entire visible Balmer series of hydrogen, from H-alpha (656nm) down to H-beta (486nm), H-gamma (434nm), and H-delta (410nm), making it ideal for stellar classification of A-type stars like Vega.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does \"High-OH\" mean for this 50µm fiber?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003e\u003cstrong\u003e\"High-OH\"\u003c\/strong\u003e refers to a high concentration of hydroxyl groups in the silica glass, which significantly improves the fiber's transparency to blue and ultraviolet (UV) light. This makes the fiber highly efficient for \u003ca href=\"\/en-int\/collections\/spectroscopy\"\u003espectroscopy\u003c\/a\u003e in the 380nm to 800nm range, ensuring faint signals in the blue end of the spectrum are not lost.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI have my telescope and eShel spectroscope set up 15 meters apart. Is the 20m fiber the right choice?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the 20-meter length is the correct choice. It provides the necessary distance with extra slack to prevent strain on the fiber or connectors as the telescope moves. Since attenuation is independent of length in this range, there is no performance penalty for choosing the 20m version over a shorter one.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of connectors does the Shelyak 50µm object fiber use?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe fiber is terminated with \u003cstrong\u003eFC-type connectors\u003c\/strong\u003e on both ends. This is a standard, robust connector used in spectroscopy and telecommunications to ensure precise and repeatable alignment of the fiber core.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eCore Diameter\u003c\/td\u003e\n\u003ctd\u003e50µm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLength\u003c\/td\u003e\n\u003ctd\u003e20 meters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnectors\u003c\/td\u003e\n\u003ctd\u003eFC type (both ends)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNumerical Aperture\u003c\/td\u003e\n\u003ctd\u003e0.22\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAttenuation\u003c\/td\u003e\n\u003ctd\u003e\u0026lt;0.5dB (independent of length)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Type\u003c\/td\u003e\n\u003ctd\u003eHigh-OH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUsable Spectral Range\u003c\/td\u003e\n\u003ctd\u003e380nm - 800nm+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFiber Transmission\u003c\/td\u003e\n\u003ctd\u003eApproximately 100% over this length\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFits spectrograph\u003c\/td\u003e\n\u003ctd\u003eShelyak eShel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003e50µm Object Fiber - 20m\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_eShel_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak eShel Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943039758621,"sku":"SHK-PF0051","price":705.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-50-m-object-fiber-5m-1_62cf15ba-34a3-4301-995e-ec23a3494a3b.jpg?v=1789616118"},{"product_id":"shelyak-pf0074","title":"Shelyak Uvex Motors Module","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eMotorizes your existing Shelyak UVEX Spectrograph\u003c\/li\u003e\n\u003cli\u003eEnables remote control of central wavelength via motorized grating\u003c\/li\u003e\n\u003cli\u003eProvides remote fine-focus adjustment for optimal resolution\u003c\/li\u003e\n\u003cli\u003eWeighs 0.55 kg on its own (1.46 kg with the UVEX, without camera)\u003c\/li\u003e\n\u003cli\u003eIntegrates control for an external calibration module\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak Uvex Motors Module\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Uvex Motors module transforms your manually-operated \u003ca href=\"\/en-int\/collections\/spectrographs\"\u003espectrograph\u003c\/a\u003e into a fully remote instrument, adding just 0.55 kg to your optical train. Housed within a 153 x 154 x 133 mm frame when installed, this upgrade provides precise, repeatable motorized control over both the grating for central wavelength selection and the fine focus mechanism for achieving optimal spectral resolution from your observatory control room.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eRemote and Automated Spectroscopy with the UVEX Motors Module\u003c\/h3\u003e\n\u003cp\u003eThis module is a direct upgrade for the Shelyak UVEX spectrograph, converting it from a hands-on instrument to a fully automated component of your imaging setup. By motorizing the critical adjustments, you can now operate the UVEX remotely, eliminating vibrations and enabling long, scripted observation sequences without being physically present at the telescope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eMotorized Grating and Focus: Precision Control in a 0.55 kg Package\u003c\/h3\u003e\n\u003cp\u003eThe core of this upgrade lies in its two primary motorized functions. The motorized grating allows you to remotely select the central wavelength of your spectrum, making it possible to study different spectral features of a target in a single session. The motorized focus is critical for compensating for temperature changes throughout the night, ensuring your spectra remain perfectly sharp for the highest possible resolution.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWavelength Selection:\u003c\/strong\u003e Remotely scan different areas of the spectrum without touching the instrument, ideal for variable stars or objects with complex spectral features.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFocus Adjustment:\u003c\/strong\u003e Achieve and maintain critical focus to resolve fine spectral lines, a task that is nearly impossible to perfect manually on a remote system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimal Footprint:\u003c\/strong\u003e The entire motorized system adds 0.55 kg to the UVEX, a manageable weight that typically requires only minor rebalancing of your mount.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eAutomated Calibration: 4-Position Control for Sky, Dark, Flat \u0026amp; Cal Frames\u003c\/h3\u003e\n\u003cp\u003eBeyond mechanical control, the Uvex Motors module integrates the logic for a complete, automated calibration workflow. It includes the same control features as the SPOX module, allowing it to manage an external calibration unit. This enables you to seamlessly switch between acquiring data from the sky and capturing necessary dark, flat, and calibration lamp frames for professional-grade data reduction.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoftware Integration:\u003c\/strong\u003e The module is fully supported by Shelyak's DEMETRA software for a plug-and-play experience.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen Protocol:\u003c\/strong\u003e For users with custom observatory software, Shelyak has published the USIS communication protocol, allowing for deep integration into any control environment.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary benefit of adding the Uvex Motors module to my spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary benefit is \u003cstrong\u003eremote operation\u003c\/strong\u003e. The Uvex Motors module allows you to control the spectrograph's grating (central wavelength) and focus from a computer, eliminating the need to be physically at the telescope. This is essential for automated observatories and for maintaining optimal focus as temperatures change during the night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need a separate calibration module to use all the features of the Uvex Motors module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The Uvex Motors module includes the electronic control system for an \u003cstrong\u003eexternal calibration module\u003c\/strong\u003e, but the calibration unit itself is a separate item. This feature allows you to automate your entire data acquisition sequence, from capturing the target's spectrum (Sky) to taking Flat, Dark, and reference lamp (Calibration) frames.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I control the Uvex Motors module with software other than DEMETRA?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. While it is designed for seamless integration with Shelyak's DEMETRA software, the module uses an open communication protocol called \u003cstrong\u003eUSIS\u003c\/strong\u003e. Shelyak provides documentation for this protocol, allowing advanced users to write their own scripts or integrate control into their own observatory software; Shelyak also provides a small USIS Controller application.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Uvex Motors module help when observing a Be star like Gamma Cassiopeiae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eBe stars like Gamma Cassiopeiae (gamma Cas) have dynamic emission lines (like H-alpha) that change over time. The Uvex Motors module allows you to precisely and repeatedly center your grating on these specific lines night after night. You can also remotely check focus to ensure you achieve the highest possible resolution to measure subtle changes in the line profiles, which is crucial for this type of scientific work.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill I need to rebalance my telescope after installing the 0.55 kg Uvex Motors module?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eMost likely, yes. The module and the UVEX spectrograph together weigh 1.46 kg (without a camera). This additional weight will almost certainly require you to rebalance your mount in both axes to ensure accurate tracking and guiding.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI use an 8\" SCT at f\/10. How does motorized focus on the Uvex Motors module improve my results?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eOn an SCT, temperature changes can cause significant focus shift. The motorized focus control of the Uvex Motors module is a major advantage. It allows you to make tiny, precise adjustments to the spectrograph's internal focus remotely throughout the night, ensuring your spectral lines remain sharp and narrow without having to touch the telescope's primary focuser, which can introduce mirror shift.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotorized Grating Control\u003c\/td\u003e\n\u003ctd\u003eAllows remote selection of the central observation wavelength.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMotorized Focus Control\u003c\/td\u003e\n\u003ctd\u003eAllows remote fine-tuning of focus for optimal optical quality.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCalibration Module Control\u003c\/td\u003e\n\u003ctd\u003eRemotely controls an external calibration unit, switching between Sky, Dark, Flat, and Calibration light sources.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (with UVEX)\u003c\/td\u003e\n\u003ctd\u003e153 x 154 mm, Height: 133 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight (with UVEX, no camera)\u003c\/td\u003e\n\u003ctd\u003e1.46 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKind\u003c\/td\u003e\n\u003ctd\u003eMotorization module for the UVEX\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput power\u003c\/td\u003e\n\u003ctd\u003e12 V DC (1 A min), not included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003e5.5 x 2.5 mm, positive in the center\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutputs \/ ports\u003c\/td\u003e\n\u003ctd\u003e12 V power input, USB, calibration module control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl \/ software\u003c\/td\u003e\n\u003ctd\u003eUSB (USB 2 cable not included): Demetra, USIS Controller or USIS protocol\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e0.55 kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eGrating motor module (SE0254)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eMain cover (SE0255)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eCalibration cable (SE0259)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eSpare parts kit (SE0258)\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_UVEX_Motors_Module_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak UVEX Motors Module Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943040053533,"sku":"SHK-PF0074","price":2650.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-Uvex-Motors-module-1_d2d12418-d094-4058-ae73-21a70450c813.jpg?v=1789616127"},{"product_id":"shelyak-pf0081","title":"Shelyak TimeBox II","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eSynchronizes computer time to UTC via GPS\u003c\/li\u003e\n\u003cli\u003eAchieves timing accuracy of +\/- 2 milliseconds\u003c\/li\u003e\n\u003cli\u003eUltra-compact dimensions: 70 mm x 40 mm x 18 mm\u003c\/li\u003e\n\u003cli\u003eLightweight design at only 60 g (excluding cables)\u003c\/li\u003e\n\u003cli\u003eEngineered for precise dating of stellar occultations\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- more --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli class=\"active\"\u003eDescription\u003c\/li\u003e\n\u003cli\u003eFAQ\u003c\/li\u003e\n\u003cli\u003eSpecifications\u003c\/li\u003e\n\u003cli\u003eIn the Box\u003c\/li\u003e\n\u003cli\u003eDownloads\u003c\/li\u003e\n\u003cli\u003eWarranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\u003cli class=\"active\"\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section-center\"\u003e\n\u003ch2\u003eShelyak TimeBox II\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak TimeBox II is a dedicated instrument designed to synchronize your PC's clock to the global UTC standard with an accuracy of +\/- 2 milliseconds. By receiving time signals directly from GPS satellites, this compact 60 g device provides an absolute time reference essential for scientific observations like stellar occultations, all within a tiny 70 mm x 40 mm x 18 mm footprint.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eGPS-Disciplined UTC Time Sync with +\/- 2 ms Accuracy\u003c\/h3\u003e\n\u003cp\u003eFor scientific work that depends on coordinated observations, network-based time is not reliable enough. The TimeBox II bypasses internet latency and jitter by using its own GPS receiver to establish an absolute time reference. This ensures your data is timestamped against Coordinated Universal Time (UTC) with a precision of +\/- 2 ms, enabling direct comparison of records from observers anywhere in the world.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-bg-light\"\u003e\n\u003cdiv class=\"DAV-section\"\u003e\n\u003ch3\u003eA 60g Tool for Coordinated Asteroid Occultation Studies\u003c\/h3\u003e\n\u003cp\u003eWeighing just 60 g, the TimeBox II is built for both permanent and portable observatories. Its primary application is the precise timing of stellar occultations—a method used to determine the size, shape, and position of asteroids. With this level of timing accuracy, your individual observation contributes directly to a larger scientific data set. For easy integration into your setup, a 3D-printable mounting bracket is available for download.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the primary purpose of the Shelyak TimeBox II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Shelyak TimeBox II is an accessory that synchronizes your computer's time with GPS time (UTC) to an accuracy of \u003cstrong\u003e+\/- 2 milliseconds\u003c\/strong\u003e. It is designed for scientific applications, particularly the precise dating of astronomical phenomena like stellar occultations, where an absolute time reference is critical.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the TimeBox II achieve its +\/- 2 ms accuracy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe TimeBox II uses an integrated GPS receiver to get its time signal directly from GPS satellites. This method bypasses the variable delays and inaccuracies of internet time servers (NTP), providing a direct, stable, and highly accurate synchronization to the Coordinated Universal Time (UTC) standard.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDo I need an internet connection for the TimeBox II to work?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo. The TimeBox II is a self-contained unit that relies exclusively on signals from GPS satellites for its time reference. It does not require any internet or network connection to function, making it ideal for use at remote dark-sky sites.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI'm observing an occultation by asteroid (16) Psyche. How does the TimeBox II improve my data?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhen you record the exact moments a star disappears and reappears behind (16) Psyche, the TimeBox II ensures those timestamps are accurate to +\/- 2 ms against the global UTC standard. This allows your data to be combined with observations from astronomers across the globe to build a precise model of the asteroid's shape and size.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the TimeBox II with my portable imaging setup in the field?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The TimeBox II weighs only \u003cstrong\u003e60 g\u003c\/strong\u003e and has a very small footprint (70 x 40 x 18 mm), making it perfect for portable setups. Since it relies on GPS, it works anywhere with a clear view of the sky, independent of local network availability.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhere can I find the mounting bracket for the TimeBox II?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eShelyak provides the design for a 3D-printable bracket as a downloadable STL file. You can find this file and other documentation on the Shelyak Instruments website, allowing you to print your own bracket to mount the TimeBox II on any surface.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003ctable class=\"DAV-specifications\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAccuracy\u003c\/td\u003e\n\u003ctd\u003e+\/- 2 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCase Dimensions\u003c\/td\u003e\n\u003ctd\u003eL 70 mm x W 40 mm x H 18 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e60 g (excluding cables)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eKind\u003c\/td\u003e\n\u003ctd\u003eGPS (GNSS) time synchronizer for PC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInput power\u003c\/td\u003e\n\u003ctd\u003eUSB, 5 V (100 mA max)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConnector\u003c\/td\u003e\n\u003ctd\u003eUSB-C (PC) and SMA (GNSS antenna)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCable length\u003c\/td\u003e\n\u003ctd\u003eGNSS antenna 5 m, USB 0.5 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMax current\u003c\/td\u003e\n\u003ctd\u003e0.1 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl \/ software\u003c\/td\u003e\n\u003ctd\u003eTimeBox II software (Windows)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eTimeBox II\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eGNSS antenna with 5 m cable\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eUSB cable, 0.5 m\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cul class=\"DAV-grid\"\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_TimeBox_II_Manual.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak TimeBox II Manual\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/www.shelyak.com\/software\/?lang=en\" target=\"_blank\"\u003e\u003csvg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewbox=\"0 0 640 512\" class=\"DAV-img-box\"\u003e\u003cpath fill=\"#0047a7\" d=\"M128 32C92.7 32 64 60.7 64 96l0 256 64 0 0-256 384 0 0 256 64 0 0-256c0-35.3-28.7-64-64-64L128 32zM19.2 384C8.6 384 0 392.6 0 403.2C0 445.6 34.4 480 76.8 480l486.4 0c42.4 0 76.8-34.4 76.8-76.8c0-10.6-8.6-19.2-19.2-19.2L19.2 384z\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eDownload Software\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003cli class=\"DAV-grid-item\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak_TimeBox_II_Support_Installation_Sheet.pdf\" target=\"_blank\"\u003e\u003csvg class=\"DAV-img-box\" viewbox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"\u003e\u003cpath d=\"M0 64C0 28.7 28.7 0 64 0L224 0l0 128c0 17.7 14.3 32 32 32l128 0 0 144-208 0c-35.3 0-64 28.7-64 64l0 144-48 0c-35.3 0-64-28.7-64-64L0 64zm384 64l-128 0L256 0 384 128zM176 352l32 0c30.9 0 56 25.1 56 56s-25.1 56-56 56l-16 0 0 32c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-48 0-80c0-8.8 7.2-16 16-16zm32 80c13.3 0 24-10.7 24-24s-10.7-24-24-24l-16 0 0 48 16 0zm96-80l32 0c26.5 0 48 21.5 48 48l0 64c0 26.5-21.5 48-48 48l-32 0c-8.8 0-16-7.2-16-16l0-128c0-8.8 7.2-16 16-16zm32 128c8.8 0 16-7.2 16-16l0-64c0-8.8-7.2-16-16-16l-16 0 0 96 16 0zm80-112c0-8.8 7.2-16 16-16l48 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 32 32 0c8.8 0 16 7.2 16 16s-7.2 16-16 16l-32 0 0 48c0 8.8-7.2 16-16 16s-16-7.2-16-16l0-64 0-64z\" fill=\"#0047a7\"\u003e\u003c\/path\u003e\u003c\/svg\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003eShelyak TimeBox II Support Installation Sheet\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/davidastro.com\/pages\/shelyak-warranty-policy\" rel=\"noopener\" target=\"_blank\"\u003eShelyak 1-Year Warranty\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943040315677,"sku":"SHK-PF0081","price":289.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/5280\/1565\/files\/Shelyak-TimeBox-II-1_7e535f95-2cb8-41a3-aa75-ea71923e3f5f.jpg?v=1789616136"}],"url":"https:\/\/davidastro.com\/en-int\/collections\/shelyak.oembed?page=2","provider":"David Astro","version":"1.0","type":"link"}