{"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: R ~600\u003c\/li\u003e\n\u003cli\u003eFast F\/4 Optical Design\u003c\/li\u003e\n\u003cli\u003eWeight: 200g\u003c\/li\u003e\n\u003cli\u003eMulti-Position Interchangeable Slits: 25µm, 50µm, 100µm, 300µm\u003c\/li\u003e\n\u003cli\u003eMechanical Backfocus: 10.5-21mm\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\u003eDownloads\u003c\/li\u003e\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\u003eShelyak Alpy 600 Spectroscope\u003c\/h2\u003e\n      \u003cp\u003eThe Shelyak Alpy 600 Spectroscope packs a resolution 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 resolution, provide a versatile platform for scientific discovery. With a flexible mechanical backfocus range of 10.5-21mm, the Alpy 600 integrates easily into existing imaging trains to open the door to astrophysical analysis.\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\u003eR~600 Resolution: Capturing Stellar Spectra with 1nm Detail\u003c\/h3\u003e\n      \u003cp\u003eThe core of the Alpy 600 is a 600 lines\/mm grism (a combination grating and prism) that delivers a resolving power of R~600. When paired with the 25µm slit, you can achieve a spectral resolution of approximately 1nm across the visible spectrum. This level of detail is sufficient to clearly identify the spectral class of stars, observe prominent absorption and emission lines, and track the evolution of variable stars from one night to the next.\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\u003eMulti-Position Slit: 25µm to 300µm for Any Target\u003c\/h3\u003e\n      \u003cp\u003eA slit is what separates a spectroscope from a simple grating, and the Alpy 600 includes a multi-position wheel for maximum flexibility. The slit isolates your target from background skyglow and nearby stars, enabling high-contrast spectra and analysis of extended objects like nebulae and planets. This makes your data quality independent of seeing conditions or minor tracking errors.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003e25µm \u0026amp; 50µm Slits:\u003c\/strong\u003e Use these for the highest resolution on bright stars to resolve fine spectral details.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003e100µm \u0026amp; 300µm Slits:\u003c\/strong\u003e Select these wider slits to allow more light through when targeting fainter objects like galaxies or nebulae, trading some resolution for stronger signal.\u003c\/li\u003e\n      \u003c\/ul\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\u003eFast F\/4 Optics in a Compact 200g Body\u003c\/h3\u003e\n      \u003cp\u003eEngineered for broad compatibility, the Alpy 600 features a fast F\/4 optical system that maximizes light throughput, allowing you to capture data on faint objects in minutes. Its remarkably low weight of 200g and compact 65mm x 45mm frame ensure it can be used with modest mounts and smaller telescopes down to 80mm in aperture without causing balance or stability issues.\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\u003eModular Integration: 10.5-21mm Backfocus and Optional Upgrades\u003c\/h3\u003e\n      \u003cp\u003eThe Alpy 600 connects to your camera via a standard M42x0.75mm T-mount thread and offers a versatile mechanical backfocus range of 10.5mm to 21mm, accommodating a wide variety of dedicated astronomy cameras. For a complete scientific workflow, the system is expandable with optional guiding and calibration modules. When fully configured with these modules, the required total backfocus is 64mm, a critical figure for planning your imaging train.\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\u003eAlpy 600 vs. Slitless Gratings: The Advantage of a Slit\u003c\/h3\u003e\n      \u003cp\u003eFor those starting in spectroscopy, a common choice is a simple slitless grating. While effective for basic stellar spectra, a slit-based instrument like the Alpy 600 represents a significant step up in scientific capability.\u003c\/p\u003e\n      \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003eSlitless Grating Advantage:\u003c\/strong\u003e They are simpler to use, as you don't need to precisely center a star on a narrow opening, and they have higher light throughput.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eAlpy 600 Advantage:\u003c\/strong\u003e The slit isolates the target object, producing a clean, high-contrast spectrum free from contamination from nearby stars or background light pollution. This is essential for accurate wavelength calibration, studying extended objects, and producing data that is robust and independent of observing conditions.\u003c\/li\u003e\n      \u003c\/ul\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 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 projects. You can classify stars by their spectral type (O, B, A, F, G, K, M), detect the Doppler shift in binary star systems, measure the expansion of the universe by observing the redshift of quasars, 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?\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.\n    \u003c\/p\u003e\n\u003cul\u003e\n      \u003cli\u003eFor \u003cstrong\u003ebright stars\u003c\/strong\u003e where you want maximum detail, use the narrowest slits (\u003cstrong\u003e25µm or 50µm\u003c\/strong\u003e).\u003c\/li\u003e\n      \u003cli\u003eFor \u003cstrong\u003efaint, extended objects\u003c\/strong\u003e like nebulae or galaxies, use the wider slits (\u003cstrong\u003e100µm or 300µm\u003c\/strong\u003e) to capture more photons at the cost of lower resolution.\u003c\/li\u003e\n    \u003c\/ul\u003e\n    \n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use my DSLR with the Shelyak Alpy 600?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, you can use a DSLR. The Alpy 600 connects via a standard T-mount (M42x0.75mm), and you will need a T-ring for your specific camera model. However, for best results, a sensitive monochrome astronomy camera is recommended as it will capture faint spectral lines more efficiently than a color CMOS sensor.\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 is ideal for studying Be stars like Gamma Cassiopeiae (Navi). It allows you to clearly resolve the prominent Hydrogen-alpha emission line that characterizes these stars, which appears as a sharp spike \"filling in\" the normal absorption line. 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 Alpy 600 is excellent for planetary spectroscopy with a telescope like 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 belts and zones, you can detect differences in their chemical composition.\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 strictly required to start, the optional modules significantly improve the workflow. The \u003cstrong\u003eguiding module\u003c\/strong\u003e lets you see the field of view to accurately place and keep your target on the narrow slit. The \u003cstrong\u003ecalibration module\u003c\/strong\u003e provides a reference lamp spectrum (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\u003c\/li\u003e\n\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    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/li\u003e\n\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\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":1349.0,"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 spectroscopy by adding only 260g and a compact 90x65x75mm profile to your imaging train. This essential accessory for the Alpy 600 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 spectroscope'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 guiding camera, 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. This surface allows a tiny fraction of the starlight to pass through to the spectroscope while reflecting the vast majority of the surrounding field of view at a 90-degree angle 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 eyepiece holder (sold separately). This allows you to look through an eyepiece 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\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 Alpy 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\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":1557.0,"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 Alpy 600 and UVEX spectrographs, 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 spectroscopy 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, effectively blocking all light from the telescope without needing to cap it manually. 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 power supply 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 the \"Dark\" mode, the screen moves into the telescope's light path, completely blocking incoming light from the sky. With both internal lamps switched off, this allows the spectrograph to capture a dark frame under the same conditions as your light frames, without you needing to manually cap the telescope.\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 sends a 12V signal to move the module's screen into place (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\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 Alpy 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\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":1279.0,"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\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 spectroscope by threading directly into any standard 1.25″ filter wheel 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 spectroscopy. 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 transmission grating 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 astronomy camera, or placed in a 1.25\" filter wheel for easy switching between standard imaging and spectroscopy. No special adapters or changes to your optical train are required.\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\" T-adapter 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\" filter holder, 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 diagonal. No other equipment is needed to begin capturing stellar spectra.\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\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\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":44968070807837,"sku":"SHK-PF0003","price":258.0,"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\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 spectroscope. This simple accessory threads into your filter wheel 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 spectroscopy 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\n\u003cstrong\u003eStar Analyser 200 (This Model):\u003c\/strong\u003e Its higher dispersion is optimized for the close proximity found inside a filter wheel. Placing it further away would result in a spectrum that is too long to fit on the sensor.\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. For all other applications where the grating will be further from the sensor, the SA100 is the standard choice.\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\"\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\" or 2\" filter wheel. 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 B) is rich in absorption lines in the orange\/red part of the spectrum, while the blue B-type main-sequence star (Albireo A) 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. Popular free software options like \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\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\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":44968070971677,"sku":"SHK-PF0040","price":296.0,"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\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 diffraction grating 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 essential when using a camera with small pixels or a short focal length telescope, 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 spectrograph'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\u003eOn a camera with a large sensor or with a short focal length instrument, a star's spectrum can appear very small 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\u003eYes, it is particularly useful in this scenario. Cameras with small pixels require a more spread-out spectrum to avoid undersampling the spectral details. Using a spacer ensures that the resolved details from the grating are projected over enough pixels to be properly recorded by the camera.\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\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\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":44968071037213,"sku":"SHK-BA0014","price":47.0,"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\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\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 spectroscope and any standard 2-inch telescope focuser. 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\u003eThis adapter is the standard solution for connecting the Lhires III spectroscope, which typically uses smaller threaded connections, to the larger 2-inch format common on Schmidt-Cassegrains, Ritchey-Chrétiens, and larger refractors. By converting the input of the spectroscope to a simple 2-inch barrel, you gain a solid, stable platform for your scientific work, ensuring the entire optical train remains perfectly collimated through long exposures.\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 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 your telescope has a 2-inch focuser and you do not have another way to adapt the Lhires III's native mounting thread to it. It is the most direct and stable method for using the spectroscope with larger amateur telescopes.\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\u003eThe adapter threads directly onto the input side of the Lhires III spectroscope body. The other end is a smooth 2-inch barrel that slides into your telescope's focuser and is secured by the focuser's compression ring or set screws, just like a standard 2-inch eyepiece.\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":52943026290973,"sku":"SHK-BA0001","price":131.0,"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 Canon EOS to T-Mount (M42x0.75)","description":"\u003cul class=\"DAV-feature-list\"\u003e\n\u003cli\u003eAdapts Canon EOS (EF\/EF-S) camera bodies to the standard T-mount\u003c\/li\u003e\n\u003cli\u003eProvides female M42x0.75 T-threads for secure connections\u003c\/li\u003e\n\u003cli\u003eEnables prime-focus astrophotography through a telescope\u003c\/li\u003e\n\u003cli\u003eEssential for connecting to T-threaded flatteners, reducers, and filter wheels\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 is the fundamental link for attaching a Canon EOS camera body to virtually any telescope for prime-focus astrophotography, providing a solid connection via the universal M42x0.75 T-thread standard. By replacing your camera's lens, this adapter converts the camera's bayonet mount into a female M42x0.75 threaded interface, allowing direct coupling to your imaging train.\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 Canon EOS Cameras to M42x0.75 T-Thread Accessories\u003c\/h3\u003e\n      \u003cp\u003eThe M42x0.75 thread, commonly known as the T-thread or T-mount, is the industry standard for astronomical accessories. This adapter allows you to securely attach your Canon DSLR or mirrorless camera body to a telescope's focuser (using a separate T-to-1.25\" or T-to-2\" nosepiece), a field flattener, a coma corrector, an off-axis guider, or a filter wheel.\u003c\/p\u003e\n      \u003cp\u003eThis direct, threaded connection is far more secure than eyepiece projection methods, eliminating flexure and ensuring the camera sensor remains perfectly parallel to the focal plane. It is the essential first piece required to begin imaging the night sky with a Canon EOS camera through a telescope.\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\u003eIts primary function is to allow you to attach a \u003cstrong\u003eCanon EOS DSLR or mirrorless camera body\u003c\/strong\u003e to any telescope or accessory that uses the standard \u003cstrong\u003eM42x0.75 T-thread\u003c\/strong\u003e. This enables prime-focus astrophotography by placing your camera's sensor at the telescope's focal point.\u003c\/p\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 Canon EOS Rebel to my 8\" SCT for imaging Jupiter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e You would attach this adapter ring to your Canon Rebel body in place of the lens. Then, you would typically thread the camera onto a separate SCT T-Adapter, which screws onto the rear cell of your telescope. This places your camera's sensor at the correct position to capture a focused image of Jupiter.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWill autofocus and electronic aperture control work with this EOS \/ T-mount adapter?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eNo.\u003c\/strong\u003e This is a purely mechanical adapter and does not have any electronic contacts. It cannot pass power or data between the camera body and the telescope. You must use your camera in full \u003cstrong\u003eManual (M) mode\u003c\/strong\u003e for both focusing and exposure control.\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 universal standard in astronomy. You can use this adapter to connect your Canon EOS camera to a wide range of imaging accessories, including:\u003c\/p\u003e\n    \u003cul\u003e\n    \u003cli\u003eFilter wheels and filter drawers\u003c\/li\u003e\n    \u003cli\u003eOff-axis guiders (OAGs)\u003c\/li\u003e\n    \u003cli\u003eField flatteners and focal reducers\u003c\/li\u003e\n    \u003cli\u003eComa correctors\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\"\u003eIs this adapter compatible with both full-frame (EF) and crop-sensor (EF-S) Canon EOS cameras?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e The physical bayonet mount is identical on both full-frame (e.g., Canon 5D, 6D, Ra) and crop-sensor APS-C (e.g., Canon Rebel series, 90D, 7D) camera bodies. This adapter will securely fit all Canon EOS DSLRs. It will also fit Canon EOS R-series mirrorless cameras when used with the standard Canon EF-EOS R mount adapter.\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\u003e\u003cstrong\u003eYes.\u003c\/strong\u003e This adapter provides the T-threads on your camera body. To connect to a 2\" focuser, you will also need a separate \"2-inch prime focus adapter.\" This is a simple barrel with male T-threads on one end (which screw into this adapter) and a 2-inch nosepiece on the other end that slides into your telescope's focuser.\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":313.0,"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\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 spectrograph, 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 focal reducers, allowing you to optimize your SCT's focal ratio for spectroscopy.\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 Alpy 600, LISA, or UVEX to any Schmidt-Cassegrain telescope 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\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 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 T-ring, 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\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\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\n\u003cli\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":52943026782493,"sku":"SHK-BA0027","price":125.0,"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\u003eConnects female C-mount threads (25.4mm) to male T-mount threads (M42x0.75mm)\u003c\/li\u003e\n\u003cli\u003eEnables use of larger T-mount cameras on C-mount guide ports or accessories\u003c\/li\u003e\n\u003cli\u003eAll-metal construction for secure, flex-free connections\u003c\/li\u003e\n\u003cli\u003eLow profile design minimizes added back focus\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\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 astronomy camera—onto a device with a female C-mount port. This is a common requirement when using an off-axis guider's guide port, a microscope eyepiece port, or other specialized optical equipment that defaults to the smaller C-mount standard. This converter allows you to use your preferred, often larger, guide camera 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\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 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 allow a camera or accessory with male \u003cstrong\u003eT-threads (M42x0.75mm)\u003c\/strong\u003e to be attached to a device with a female \u003cstrong\u003eC-mount thread (25.4mm)\u003c\/strong\u003e. 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 finderscope.\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 T-ring attached (which provides male M42x0.75mm threads), 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 male T-thread. This adapter takes an existing male T-thread and converts it to fit into a female C-mount port. 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  \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this C-mount to T-mount adapter add significant length to the optical path?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eNo, this type of adapter is designed to be as thin as possible to minimize its impact on back focus. While it adds a few millimeters, it is generally considered a \"low profile\" adapter and should not prevent you from reaching focus in most setups that have sufficient travel.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\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\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\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":52943027110173,"sku":"SHK-BA0034","price":78.0,"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\u003eStandard C-mount (male) to CS-mount (female) threads\u003c\/li\u003e\n\u003cli\u003ePrecision-machined metal construction for secure 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\n\u003cli\u003eIn the Box\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\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 guide cameras 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\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 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—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 ZWO ASI120MM Mini guide camera?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes. The ZWO ASI120MM Mini, like many popular guide cameras, has a CS-mount. If you want to use a C-mount guide lens with it, you will need this 5mm C\/CS adapter ring to achieve focus. This applies to most cameras that ship with a CS-mount as their primary interface.\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 focuser 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\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\u003c\/ul\u003e","brand":"Shelyak","offers":[{"title":"Default Title","offer_id":52943027372317,"sku":"SHK-BA0036","price":56.0,"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\u003eStandard female T-threads (M42x0.75)\u003c\/li\u003e\n\u003cli\u003eDurable, all-metal construction for a secure, light-tight fit\u003c\/li\u003e\n\u003cli\u003eLow profile design minimizes added back focus\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 spectroscope. 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). The all-metal construction ensures that your camera is held securely without flexure, which is critical for maintaining focus and alignment throughout an imaging session. Its low-profile design adds minimal length to the optical path, helping you reach focus with a variety of telescopes and accessories.\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 T-ring works with any T-threaded accessory, it is the specific adapter recommended for attaching a Canon DSLR to Shelyak's line of high-resolution 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 spectroscopy 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 Shelyak Alpy 600 spectroscope 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":61.0,"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\u003eCovers the design of amateur spectrographs like the Lhires III\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\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 spectroscopy, spectrograph 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 details the practical considerations for building and using spectrographs. It explores the design principles that led to instruments like the Lhires III, which itself was an outcome of the Oleron 2003 conference, giving you direct insight into the hardware required for 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\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. These chapters bridge the gap between technique and discovery.\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 specific hardware references like the Lhires III spectrograph have been succeeded by newer models, 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 details the design principles and trade-offs, using the Lhires III as a prime example that was 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\n\u003cli\u003e\n\u003cp style=\"text-align: center; padding: 1rem;\"\u003eThis product is a book and does not come with a manufacturer's warranty.\u003c\/p\u003e\n\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\u003eFormat: Paperback Book\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 entirely on the practical steps and methods needed to succeed with a slit spectroscope, 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 exclusively on the \"how.\" 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\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":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 Spectroscopy,\" is the essential starting point for any amateur astronomer looking to venture into the scientific analysis of starlight. It is a practical, hands-on manual designed to bridge the gap between owning a telescope and capturing your first stellar spectrum. 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 provides clear, step-by-step instructions on how to select and attach a spectrograph to your existing telescope, ensuring your initial setup is correct. 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\"\u003eWhat kind of telescope do I need to use the \"Practical Guide to Spectroscopy\"?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThis guide is written for users of common amateur telescopes, such as Schmidt-Cassegrains, refractors, or Newtonian reflectors on a tracking mount. The key requirement is a stable equatorial mount capable of tracking a star accurately for the duration of an exposure.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes this spectroscopy guide cover specific software for data processing?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, a practical guide to spectroscopy must address software. It will introduce you to the types of software used for capturing, calibrating, and analyzing spectra, providing a conceptual framework that applies to the most common freeware and commercial packages available to amateurs.\u003c\/p\u003e\n\u003c\/div\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\u003eAbsolutely. The book is explicitly titled \"Successfully Starting in Astronomical Spectroscopy\" and is structured to guide someone with experience in astrophotography or visual observing through their very first steps in spectroscopy. It assumes no prior knowledge of the subject.\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. This guide provides the exact techniques you would need to capture and identify these features in Vega's spectrum using your own equipment.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill this guide help me understand the results from my spectrograph on an object like the Orion Nebula (M42)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile the primary focus for beginners is often stellar spectroscopy, the principles taught in this guide are foundational. You will learn about emission lines, which are characteristic of nebulae like M42, providing the knowledge base needed to tackle these more advanced deep-sky targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat is the most important first step this practical guide recommends?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe guide emphasizes a solid foundation in equipment setup and calibration. The most critical first step it details is achieving a sharp focus on both your target star and the spectrograph's slit, as this is essential for acquiring high-quality, usable data from the very beginning.\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\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 spectrographs. 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 power supply 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 spectroscopy 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 \u003cstrong\u003eThorium-Argon lamp\u003c\/strong\u003e is a component, is typically used with Schmidt-Cassegrain or Ritchey-Chrétien telescopes in the 8\" to 14\" aperture range. The system is optimized for telescopes with focal ratios around f\/10, though it can be adapted to others. 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\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":52943028715805,"sku":"SHK-EL0037","price":1463.0,"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, ensuring reliable power for compatible astronomical mounts, cameras, and accessories.\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\u003eThe 12V, 3A specification is a common standard for powering equatorial mounts, cooled CMOS cameras, and other high-draw accessories. This unit maintains stable voltage for your equipment, which is critical for consistent tracking performance and low-noise sensor operation during imaging.\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\u003eThis power supply is designed for astronomical equipment requiring a 12V DC input and drawing up to 3A of current. This commonly includes many models of equatorial mounts, cooled astronomy cameras, and electronic filter wheels. 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\"\u003eWill this 12V\/3A power supply work for my Celestron AVX mount in the US?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile many Celestron mounts use a 12V input, you must verify two things. First, check that the mount's power port matches the 2.5mm x 5.5mm barrel plug and requires center-positive polarity. Second, this unit ships with a European 220V mains cable by default. To use it in the US, you will need to request a 110V US format cable.\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 for tasks like long-exposure imaging and precise mount tracking.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eI plan to power a ZWO ASI2600MC Pro camera. Is this 3A supply sufficient?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eA ZWO ASI2600MC Pro's TEC cooler can draw 3A on its own at 100% cooling power. While this supply matches that peak requirement, there is no headroom for other accessories like a dew heater or electronic filter wheel. It is critical to add up the maximum current draw of all devices you intend to power simultaneously to ensure your power supply's amperage is sufficient.\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 telescope or camera. 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\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":40.0,"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 Schmidt-Cassegrain telescope into a faster f\/6.3 instrument, specifically for spectroscopy. This 0.63x reduction is achieved with a high-contrast apochromatic triplet optical system. 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 spectrograph like the Alpy 600 or UVEX, dramatically improving signal-to-noise ratio and reducing exposure times on faint targets.\u003c\/p\u003e\n\u003cp\u003eUnlike standard reducers designed for visual use or general imaging, this 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 T-adapter (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\u003eShelyak 0.63x vs. Celestron f\/6.3: A Spectroscopist's Choice\u003c\/h3\u003e\n\u003cp\u003eWhile both reducers offer a similar focal length, they are designed for different tasks. The choice depends entirely on your primary application.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCelestron f\/6.3 Reducer\/Corrector:\u003c\/strong\u003e Its primary advantage is wide-field correction. It's a 4-element design engineered to correct for the coma inherent in SCTs, delivering sharp stars across a large imaging sensor. It is the superior choice for deep-sky astrophotography.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShelyak 0.63x Reducer:\u003c\/strong\u003e This reducer's strength is color fidelity at the focal point. The apochromatic triplet is optimized for axial color correction, not off-axis coma. For spectroscopy, where all the light from a single star passes through a tiny slit, this superior color correction is far more important than wide-field sharpness.\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\u003eThe key difference is the optical design and purpose. Standard reducers are also correctors, designed with 4-element lenses to flatten the field and reduce coma for wide-field imaging. The Shelyak reducer uses an \u003cstrong\u003eapochromatic triplet\u003c\/strong\u003e design optimized for on-axis color correction, which is more critical for preventing wavelength shifts and ensuring the scientific accuracy of your spectral data.\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 resulting f\/6.3 focal ratio is perfectly matched to the input requirements of the Alpy 600, ensuring optimal illumination of its slit for low-resolution spectroscopy.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eDoes the Shelyak 0.63x reducer correct for coma or field curvature?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, this is a dedicated focal reducer, not a corrector. Its primary design goal is focal reduction and high-fidelity color correction at the center of the field, where the spectrograph slit is placed. It is not designed to correct for off-axis aberrations like coma or field curvature, making it less suitable for wide-field deep-sky imaging than a dedicated reducer\/corrector.\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 visual back 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\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use this reducer for deep-sky imaging of the Orion Nebula (M42) instead of spectroscopy?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eWhile you can, it's not its intended purpose. The reducer will successfully shorten your exposure times by converting your scope to f\/6.3. However, because it does not correct for coma, you will likely notice that stars away from the center of the field appear elongated or misshapen, an effect that would be noticeable across a large target like the Orion Nebula (M42).\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\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":322.0,"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\u003eReplacement Tungsten Lamp\u003c\/li\u003e\n\u003cli\u003eSpare Part for Flat-Field Calibrators\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 direct replacement tungsten lamp for flat-field calibration units. It provides the stable, continuous-spectrum light source required for creating high-quality flat frames, ensuring your astrophotography is free from artifacts like dust motes and vignetting. Keeping a spare on hand is critical for preventing a burned-out bulb from ending an imaging session prematurely.\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\u003eTungsten Lamp: Consistent Illumination for Flat-Field Calibration\u003c\/h3\u003e\n      \u003cp\u003eA reliable light source is the foundation of accurate data calibration. This tungsten lamp is designed to deliver consistent output and color temperature, allowing you to build a reliable library of flat frames. Its incandescent nature produces a smooth, broadband spectrum ideal for calibrating both monochrome and color sensors without introducing unwanted spectral lines.\u003c\/p\u003e\n      \u003cp\u003eLamps are consumable components with a finite lifespan. Having this spare ensures that when your primary lamp eventually fails—often at the most inconvenient moment during a clear night—you can replace it quickly and continue your imaging run with minimal downtime. It is an essential part of any imager's field kit.\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 replacement \u003cstrong\u003etungsten lamp\u003c\/strong\u003e intended for use in an astronomical flat-field calibration device (a \"flat box\" or \"flat panel\"). Its purpose is to provide a uniform, stable light source for taking flat frames, which are essential for correcting optical artifacts in your images.\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 lamp in your flat box has a limited operational life and will eventually burn out. This can happen without warning. Keeping a spare lamp on hand ensures that a simple bulb failure doesn't ruin an imaging session, allowing you to 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. This is ideal for calibration because it evenly illuminates pixels across the entire sensor, working well for both \u003cstrong\u003emonochrome\u003c\/strong\u003e and \u003cstrong\u003eone-shot-color\u003c\/strong\u003e cameras without the emission line spikes found in other lamp types like fluorescent or some LEDs.\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 specific flat panel?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis is a spare part designed for specific models of flat-field generators. 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    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow will this spare lamp help when imaging faint targets like the Horsehead Nebula (B33)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eImaging faint targets like the Horsehead Nebula (B33) requires aggressive contrast stretching, which greatly exaggerates any dust on your sensor or vignetting in your optical train. A high-quality flat frame, taken with a stable light source like this tungsten lamp, allows your software to perfectly remove these defects. This ensures the faint, delicate details of the nebula are not obscured by artifacts.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eDoes a good flat frame matter for bright targets like the Orion Nebula (M42)?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eYes, absolutely. While bright objects like the Orion Nebula (M42) may not require as much stretching, an uncalibrated image will still show distracting dust rings and darkened corners (vignetting). Using a flat frame created with this lamp ensures a clean, evenly illuminated final image, allowing the full dynamic range and structure of the nebula to be presented correctly.\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":17.0,"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\u003eSecurely houses the Star Analyser 200 grating (sold separately)\u003c\/li\u003e\n\u003cli\u003eEnables easy integration into a standard 1.25\" or 2\" optical train\u003c\/li\u003e\n\u003cli\u003eEssential for using the SA-200 grating with filter wheels or camera nosepieces\u003c\/li\u003e\n\u003cli\u003eProvides a stable, correctly aligned mount for consistent results\u003c\/li\u003e\n\u003cli\u003eProtects the delicate diffraction grating from handling and debris\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\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 mounting kit provides the essential housing for the Star Analyser 200 diffraction grating. It is designed to securely hold the bare SA-200 grating, allowing you to integrate it seamlessly into your existing imaging train. By converting the standalone grating into a threaded cell, this kit enables its use in standard filter wheels, camera nosepieces, and other accessories, transforming it into a functional and protected spectroscopic 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\u003eSecure Your Star Analyser 200 for Spectroscopic Imaging\u003c\/h3\u003e\n\u003cp\u003eIf you have purchased the Star Analyser 200 grating as a standalone component, this mounting kit is the critical next step for putting it to use. The kit provides a precisely machined housing that protects the delicate grating while ensuring it is held flat and perpendicular to the optical axis. This stability is crucial for acquiring clean, high-resolution stellar spectra without flexure or misalignment.\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\u003eThe Star Analyser 200 is often sold as a bare diffraction grating. This mounting kit provides a protective housing for that grating, converting it into a standard threaded cell. This allows you to mount the spectroscope in a filter wheel, eyepiece barrel, or camera nosepiece just like a standard filter.\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\u003eIf you purchased the Star Analyser 200 as a standalone grating without any housing, then yes, you will need this kit to use it with your telescope and camera. If you purchased a version of the Star Analyser that was already mounted in a cell, you do not need 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\u003eBy securing the Star Analyser 200 grating in your optical path, this kit allows you to capture the dispersed light from a bright star. When you image Vega through the mounted grating, its light is spread into a spectrum, revealing absorption lines like the Balmer series of hydrogen, which are characteristic fingerprints of the star's composition and temperature.\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\u003eYes, this is one of its primary functions. The mounting kit is designed to create a cell with standard filter threads, allowing you to install the Star Analyser 200 into an empty slot in your filter wheel. This makes it easy to switch between standard imaging and spectroscopy during an observing session with your Schmidt-Cassegrain or other telescope.\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 (the housing). The Star Analyser 200 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\"\u003eWhat tools are needed to install the grating into the Star Analyser 200 mounting kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eInstallation is typically straightforward and requires minimal tools, often just a retaining ring spanner or a similar tool to secure the grating inside the cell. Always handle the grating by its edges to avoid touching the optical 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\u003eSpecifications\u003c\/td\u003e\n\u003ctd\u003eNo specifications available for this product.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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\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":52943029764381,"sku":"SHK-EL0166","price":63.0,"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\u003eExclusive Compatibility with 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\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 power cables 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 interface exclusively 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\u003eNo, it is designed exclusively for use with the \u003cstrong\u003eShelyak PF0082 high voltage power supply\u003c\/strong\u003e. It is not a universal connector and will not work with other power systems.\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\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would I use this connector to power a Thorium-Argon lamp for my Lhires III spectrograph?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou would solder the appropriate high-voltage cable to this connector's terminals, then connect the other end of the cable to your Thorium-Argon lamp's input. The connector itself then plugs into the Shelyak PF0082 power supply, which powers the lamp for calibrating your Lhires III.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs soldering required to use this High Voltage Power Connector?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, to ensure a secure and reliable electrical connection suitable for high-voltage applications, you will need to solder your wire to the connector's terminals.\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":52943029993757,"sku":"SHK-EL0334","price":26.0,"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\u003eHigh-Resolution Spectroscopic Analysis\u003c\/li\u003e\n\u003cli\u003eOptimized for Schmidt-Cassegrain Telescopes\u003c\/li\u003e\n\u003cli\u003eIntegrated C-Mount Guide Port (0.8x)\u003c\/li\u003e\n\u003cli\u003eMirror Slit for Precise Target Acquisition\u003c\/li\u003e\n\u003cli\u003eCompact and Lightweight at 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\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\u003eLhires III Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak Lhires III Spectroscope packages high-resolution optics into a compact 250 mm x 200 mm x 83 mm chassis weighing just 1.7 kg. Its integrated C-mount guide port features a 0.8x focal reducer and provides a mechanical backfocus of 17.5 mm for a guide camera, enabling precise tracking for detailed stellar 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\u003eGuiding \u0026amp; Slit Design: 0.8x C-Mount Port and 17.5mm Back Focus\u003c\/h3\u003e\n\u003cp\u003eThe Lhires III incorporates a mirror slit, allowing you to view the field around your target for precise centering and guiding. This is critical for high-resolution work where the star must be held perfectly on the narrow slit for the duration of the exposure. To maintain this alignment, an integrated C-mount guide port with a 0.8x focal reducer and 17.5 mm of mechanical backfocus allows you to connect a separate guide camera (not included) for active autoguiding.\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\u003ePhysical Build: A Compact 1.7 kg, 250mm x 200mm x 83mm Chassis\u003c\/h3\u003e\n\u003cp\u003eEngineered for stability and compatibility, the Lhires III weighs only 1.7 kg, making it a manageable payload for a wide range of equatorial mounts. Its 250 mm x 200 mm x 83 mm dimensions ensure it fits within typical imaging train clearances. The instrument is particularly well-suited for Schmidt-Cassegrain telescopes but can be adapted to faster optical systems with the addition of a Barlow lens to achieve the optimal focal 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\u003eHigh-Resolution Science: Doppler Shift Analysis \u0026amp; Pro-Am Collaboration\u003c\/h3\u003e\n\u003cp\u003eThis spectroscope is designed specifically for isolating and analyzing the fine details within individual spectral lines. While this high-resolution focus means the observable spectral range is narrow at any one time, a micrometer adjustment lets you select any wavelength in the visible spectrum. This capability makes the Lhires III an ideal tool for advanced projects, including measuring the Doppler effect to study stellar activity or observing the rotation of planets like Jupiter and Saturn.\u003c\/p\u003e\n\u003cp\u003eThe Lhires III is a proven instrument for scientific collaboration between amateur and professional astronomers. It has been used in numerous published studies on Be-type stars, variable stars, and other dynamic celestial objects, making it a gateway to contributing to real astrophysical research.\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 Lhires III Spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lhires III is optimized for an f\/10 focal ratio, making it an excellent match for Schmidt-Cassegrain (SCT) and Maksutov-Cassegrain telescopes. It can be adapted to faster instruments, such as f\/5 Newtonians or refractors, by placing a Barlow lens in the optical path before the spectroscope.\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. By orienting the slit along Jupiter's equator, you can capture the spectrum from both the approaching and receding limbs of the planet simultaneously. The resulting tilt in the spectral lines is a direct measurement of the Doppler shift caused by the planet's rotation, a classic educational and scientific project well within the Lhires III's capabilities.\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 will need a separate C-mount guide camera and autoguiding software. The Lhires III has a built-in guide port with a \u003cstrong\u003e0.8x focal reducer\u003c\/strong\u003e and \u003cstrong\u003e17.5 mm of backfocus\u003c\/strong\u003e. The mirror slit reflects the field of view to this port, allowing the guide camera to monitor the target star and send corrections to your telescope mount.\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 Spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Lhires III comes with a standard adapter for ATIK cameras, which have a 13mm mechanical backfocus. Shelyak offers a wide range of optional adapter rings to connect other CCD, CMOS, or DSLR cameras with different backfocus requirements.\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?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAbsolutely. The Lhires III was originally designed in collaboration with the CNRS Astrophysics School specifically for the observation of Be stars. Its high-resolution capabilities are perfect for monitoring the complex emission line profiles (like Hydrogen-alpha) that characterize these rapidly rotating stars, making it a key instrument for pro-am campaigns.\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 micrometer adjustment to rotate the grating inside the instrument. This allows you to precisely center any wavelength within the visible spectrum (from approximately 400nm to 750nm) onto your camera's sensor, giving you the flexibility to study specific spectral features like the Sodium D lines or H-alpha.\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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":7395.0,"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\u003eProfessional echelle spectrograph system\u003c\/li\u003e\n\u003cli\u003eResolving power of R \u0026gt; 10,000\u003c\/li\u003e\n\u003cli\u003eCovers 390nm to 700nm spectral range\u003c\/li\u003e\n\u003cli\u003eFiber-optic fed for maximum stability\u003c\/li\u003e\n\u003cli\u003eIncludes FIGU, calibration module, and fibers\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 III is a complete, professional-level fiber-optic echelle spectrograph system, delivering a resolving power of R \u0026gt; 10,000 across a wide 390nm to 700nm spectral range. It achieves this by capturing diffraction orders 32 through 53 simultaneously, using a 50µm fiber for the target and a 200µm fiber for calibration to ensure maximum stability for demanding applications like exoplanet radial velocity studies.\u003c\/p\u003e\n\u003cp\u003eThis instrument is designed for observers who cannot compromise between spectral range and resolution. Developed from experience with professional spectroscopes like Musicos and Narval, the eShel III provides a turnkey solution for advanced astrophysical research. Please note, this system is available by quote 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\u003eR\u0026gt;10,000 Resolution Across the Visible Spectrum (390-700nm)\u003c\/h3\u003e\n\u003cp\u003eThe core of the eShel III is an echelle grating that uses over 30 diffraction orders to achieve high resolution. A cross-disperser then stacks these orders across the camera sensor, allowing you to capture the entire visible spectrum from 390nm to 700nm in a single exposure. This multi-order spectrum provides comprehensive data, ideal for monitoring variable stars or classifying stellar objects without sacrificing detail.\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\u003eThermally Stable Radial Velocity with a Fiber-Fed Design\u003c\/h3\u003e\n\u003cp\u003ePrecision in spectroscopy, especially for exoplanet detection, requires extreme stability. The eShel III uses a 20-meter-long optical fiber to physically separate the spectrograph from the telescope, allowing the instrument to be placed in a temperature-controlled environment. This isolation from thermal fluctuations and mechanical vibrations at the telescope is critical for accurate radial velocity measurements.\u003c\/p\u003e\n\u003cp\u003eThe complete system includes the F\/6 Fiber Injection and Guiding Unit (FIGU) for precise starlight injection into the 50µm object fiber, and a dedicated calibration module with a Thorium-Argon (ThAr) lamp. The calibration spectrum is fed through a separate 200µm fiber, providing a stable reference for sub-pixel 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\u003eIntegrated Control: Remote Acquisition and Data Reduction Software\u003c\/h3\u003e\n\u003cp\u003eThe eShel III system includes Demetra, a powerful and free software suite for MS Windows that manages the entire observation workflow. From the control room, you can remotely operate the FIGU and the calibration module, automate image acquisition, and process the complex echelle spectra. The software handles the extraction and calibration of the multiple orders, converting raw images into scientifically useful data, streamlining what would otherwise be a complex data reduction process.\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 eShel III's echelle design?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe echelle design solves the classic trade-off in spectroscopy. It delivers both \u003cstrong\u003ehigh resolution (R \u0026gt; 10,000)\u003c\/strong\u003e and a \u003cstrong\u003ewide spectral range (390-700nm)\u003c\/strong\u003e simultaneously. This is impossible with a traditional single-order spectrograph, making the eShel III ideal for comprehensive studies of stellar atmospheres, variable stars, and exoplanet transits.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhy does the eShel III system use optical fibers?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe optical fibers are crucial for achieving the high stability required for precise radial velocity measurements. By physically separating the spectrograph from the telescope with a \u003cstrong\u003e20-meter fiber\u003c\/strong\u003e, the instrument can be kept in a thermally stable room, isolated from temperature changes and vibrations that would otherwise compromise the data. This is a standard technique in professional observatories.\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 III complete system?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eShel III is sold as a complete, integrated solution. The package 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 20m, 50µm optical fiber for the target star\u003c\/li\u003e\n\u003cli\u003eA 20m, 200µm optical fiber for the calibration lamp\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eYou will need to provide a suitable astronomical camera and telescope.\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 III?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eShel III does not include a camera. The choice of camera depends on your research goals, but it requires a sensor large enough to capture the full array of stacked spectral orders. A camera like the \u003cstrong\u003eATIK 460EX Monochrome\u003c\/strong\u003e is often recommended, as its sensor size and pixel characteristics are well-matched to the instrument's output when used in 2x2 binning mode.\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 III to study the radial velocity of a star like 51 Pegasi?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eTo measure the subtle Doppler shift caused by an exoplanet, you would use the fiber-fed system to ensure thermal stability. You would acquire a long series of spectra of 51 Pegasi, taking a calibration spectrum with the internal \u003cstrong\u003eThAr lamp\u003c\/strong\u003e before and after each observation. The \u003cstrong\u003eR \u0026gt; 10,000 resolution\u003c\/strong\u003e is high enough to detect the small wavelength shifts, and the Demetra software would be used to precisely measure these shifts against the stable ThAr reference lines, revealing the gravitational \"wobble\" induced by its planet.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the eShel III capture the spectrum of a pulsating star like BW Vulpeculae in a single exposure?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, this is an ideal application for the eShel III. Its ability to capture the entire \u003cstrong\u003e390-700nm spectrum\u003c\/strong\u003e at high resolution in one shot allows you to monitor changes in spectral lines across the star's atmosphere simultaneously. For a rapidly pulsating star like BW Vulpeculae, taking a series of 5-minute exposures would allow you to build a time-series dataset to analyze the atmospheric dynamics throughout its pulsation cycle.\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\u003eInput Connection\u003c\/td\u003e\n\u003ctd\u003eFiber-optic (FC\/PC connector)\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\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\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)\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\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\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (20m length)\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\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (20m length)\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\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 spectrograph. 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 power supply 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 spectroscopy 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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlso Compatible With\u003c\/td\u003e\n\u003ctd\u003eAlpy 600, LISA (requires different cable\/adapter)\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\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e12V DC (power supply not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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":52943030649117,"sku":"SHK-ES0012","price":562.0,"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\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 spectrograph'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 power supply, 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 Alpy 600 and LISA spectrographs, this specific kit includes a cable with a Tiny XLR connector designed only for the \u003cstrong\u003eLhires III\u003c\/strong\u003e. Using it with an Alpy 600 or LISA would require a different cable and adapter.\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\u003eAlpy 600, LISA, LHIRES III\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\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e12V DC (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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":52943030911261,"sku":"SHK-ES0013","price":562.0,"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 Alpy 600, 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 internal tungsten flat-field lamp or the Neon\/Argon spectral calibration lamp. 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 power supply 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 provides instant visual confirmation if a lamp is faulty.\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 internal calibration lamps on 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 spectroscopy 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 spectrograph's internal 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 pier 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, 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\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003e12V DC (power supply 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\"\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":644.0,"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\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\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 Alpy 600, LISA, and LHIRES III spectrographs 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.\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 power supply, 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. The included 0.8m cable features a \u003cstrong\u003eTiny XLR connector\u003c\/strong\u003e that plugs directly into the LHIRES III spectrograph. 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\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\u003ePower Requirement\u003c\/td\u003e\n\u003ctd\u003eDC Power Supply (not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eIndicators\u003c\/td\u003e\n\u003ctd\u003eRed LED for lamp fault detection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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":52943031501085,"sku":"SHK-ES0015","price":644.0,"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\u003eWide spectral range from 350 nm (UV) to 1 µm (IR)\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\u003c\/li\u003e\n\u003cli\u003eLightweight 1.2 kg body (without camera)\u003c\/li\u003e\n\u003cli\u003eIncludes a 600 lines\/mm grating blazed at 500nm\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\u003eUVEX Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak UVEX Spectroscope is a highly versatile instrument built on an achromatic, crossed Czerny-Turner design, enabling scientific analysis across a vast spectral range from 350 nm in the ultraviolet to 1µm in the near-infrared. Its multi-position slit offers six apertures, from a high-resolution 25µm slit to a wide 3mm hole for easy targeting. Weighing only 1.2 kg (without a camera), the UVEX is engineered for seamless integration with telescopes operating at an optimal F\/8 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\u003eCrossed Czerny-Turner Optics: 350nm to 1µm Spectral Range\u003c\/h3\u003e\n\u003cp\u003eThe UVEX is designed as a \"crossed\" Czerny-Turner spectroscope, an optical configuration optimized for a flat field and high image quality across its entire operational range. This achromatic design ensures that it can capture spectra from the near-ultraviolet at 350 nm to the near-infrared at 1 µm, pushing the limits of what modern CMOS and CCD sensors can detect. This allows you to analyze a wide variety of stellar types and emission phenomena, from the Balmer series in hot stars to the infrared signatures of cooler 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\u003e6-Position Slit and Interchangeable 600 tr\/mm Grating\u003c\/h3\u003e\n\u003cp\u003eControl over spectral resolution is critical, and the UVEX provides this through two key mechanisms. It includes a 6-position slit wheel, easily changed with an included screwdriver, offering 25µm, 50µm, 100µm, and 300µm slits, plus a 25µm pinhole and a 3mm hole for target acquisition. A narrower slit yields higher resolution at the cost of light throughput, giving you the flexibility to adapt to your target's brightness. The spectroscope comes standard with a 600 lines\/mm grating, and a vernier scale allows for precise positioning of the grating to center your desired wavelength on the 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\u003eF\/8 Optimization and Precise M2 Mirror Focusing\u003c\/h3\u003e\n\u003cp\u003eThe UVEX is ideally matched to telescopes with an F\/8 focal ratio, such as Ritchey-Chretien (RC) systems up to 400mm in diameter. While it can be used on systems as fast as F\/5 without vignetting, this comes with a slight degradation in image quality at the edges of the field. Focusing is managed by a precise, multi-turn knob that adjusts the internal M2 mirror, allowing you to achieve a sharp spectrum on your camera sensor without altering your telescope's main focuser.\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\u003eOptional Motorization and Included 3.2 kg Padded Case\u003c\/h3\u003e\n\u003cp\u003eDesigned for both field and observatory use, the UVEX can be upgraded with an optional motorization module for fully remote operation. For transport and storage, the instrument ships in a shockproof case with custom-cut foam, bringing the total weight to 3.2 kg. This case has dedicated slots for the spectrograph, a camera, and accessories like additional gratings or filters, ensuring your entire spectroscopy kit remains protected.\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 UVEX Spectroscope?\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, making it an excellent match for Ritchey-Chretien (RC), Schmidt-Cassegrain (SCT), or other catadioptric telescopes. It can be used on scopes as fast as F\/5, but with a minor loss of resolution at the field edges.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I change the spectral resolution with the UVEX?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYou can adjust the resolution in two ways. First, by selecting a different slit width on the \u003cstrong\u003e6-position slit wheel\u003c\/strong\u003e; a narrower slit like the 25µm provides higher resolution. Second, by swapping out the included 600 tr\/mm grating for an optional one with a different line density.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the UVEX Spectroscope capture the spectrum of a star like Vega (Alpha Lyrae) in the UV?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The UVEX has a spectral range extending down to \u003cstrong\u003e350 nm\u003c\/strong\u003e, which is well into the near-ultraviolet. This makes it ideal for studying the prominent Balmer absorption lines in the spectra of hot, 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 camera do you recommend for the UVEX Spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eShelyak recommends the \u003cstrong\u003eZWO ASI533MM Pro\u003c\/strong\u003e monochrome camera for use with the UVEX. The spectroscope is supplied with an adapter ring for ZWO cameras, and adapters for QHY and ATIK cameras are available separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the UVEX difficult to focus?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eNo, focusing is straightforward. The UVEX features a dedicated \u003cstrong\u003emulti-turn knob\u003c\/strong\u003e that adjusts the internal M2 collimating mirror. This allows you to achieve a sharp focus for the spectrum on your camera's sensor independently of the main telescope focuser.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I operate the UVEX Spectroscope from a remote observatory?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The UVEX is designed to be compatible with an \u003cstrong\u003eoptional motorization module\u003c\/strong\u003e. When installed, this allows for remote control of the grating angle and other functions, making it suitable for automated or remote observatories.\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\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\"\u003eShockproof 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\"\u003e600 tr\/mm Grating\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 1 (installed)\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\"\u003eZWO Camera 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\u003cli class=\"DAV-grid-item\"\u003e\n\u003cdiv\u003e\n\u003cp class=\"DAV-item-title\"\u003ePhillips Screwdriver\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 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\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\"\u003eAutoguiding Module Screws\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003e× 4\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":7814.0,"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\u003eFeatures 80mm focal length collimator and objective lenses\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\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) spectroscope 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 collimator 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 guiding camera.\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 spectroscopy, 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 lenses, gratings, and other elements. 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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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":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\u003e5-position slit module includes 25µm, 50µm, 100µm, and 300µm slits\u003c\/li\u003e\n\u003cli\u003eOptimized for F\/8 telescopes\u003c\/li\u003e\n\u003cli\u003eOpen-source USIS communication protocol for custom software integration\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\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 enables fully remote scientific analysis, integrating motorized control of its grating and focus with an achromatic optical design covering a wide 350 nm to 1µm spectral range. Optimized for F\/8 systems, this 1.46 Kg instrument provides a choice of five slit positions, from a high-resolution 25µm slit to a 300µm option for fainter targets, all controllable via 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\u003eAchromatic Optics: The 350 nm to 1µm Spectral Range\u003c\/h3\u003e\n\u003cp\u003eThe UVEX is built around an achromatic optical system, specifically designed to maintain focus across an expansive spectral range from the near-ultraviolet at 350 nm to the near-infrared at 1µm. This allows you to explore phenomena beyond the visible spectrum, capturing data at the limits of modern CMOS and CCD sensor capabilities without needing to constantly refocus for different wavelengths.\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\u003eFull Remote Operation at F\/8\u003c\/h3\u003e\n\u003cp\u003eThis motorized version of the UVEX is engineered for unattended, remote operation. From your control software, you can precisely set the central wavelength by adjusting the grating angle, fine-tune instrument focus, and manage an external calibration module. This integration makes it possible to automate an entire observing session: acquiring science data, then capturing dark, flat-field, and calibration lamp frames without any physical intervention 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\u003eThe 5-Position Slit Module: From 25µm to 300µm\u003c\/h3\u003e\n\u003cp\u003eThe UVEX includes a versatile slit module with five user-selectable options: 25µm, 50µm, 100µm, 300µm, and a 25µm pinhole for precise calibration. This range allows you to balance spectral resolution against signal-to-noise; use the narrow 25µm slit for detailed analysis of bright stars or the wider 300µm slit to maximize light throughput on faint nebulae. Note that slit selection is a manual adjustment performed at the instrument.\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\u003eUSIS Protocol: Open Integration for Custom Automation\u003c\/h3\u003e\n\u003cp\u003eControl of the UVEX is managed through the USIS communication protocol, an open standard documented by Shelyak. While designed for seamless integration with Shelyak's own DEMETRA software, the open protocol gives advanced users the freedom to write their own drivers and control scripts. This allows for deep integration into custom observatory automation platforms like N.I.N.A., TheSkyX, or proprietary research environments.\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 UVEX Motorized spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe primary advantage is \u003cstrong\u003efull remote operation\u003c\/strong\u003e. You can remotely control the central wavelength (grating), instrument focus, and an external calibration module. This allows for completely automated data acquisition sequences, which is essential for robotic observatories or simply for efficiency during a night of observing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow do I change the slit on the UVEX Motorized?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eSlit selection on the UVEX 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 five positions (25µm, 50µm, 100µm, 300µm, or 25µm hole). While the grating and focus are motorized, 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 works best with the UVEX Motorized at its optimal F\/8 ratio?\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\u003c\/strong\u003e focal ratio, which is common for many Schmidt-Cassegrain (SCT) and Ritchey-Chrétien (RC) telescopes, especially when used with a focal reducer. A standard C8 or a 10-inch RC would be excellent matches, providing a bright, well-focused beam to the spectroscope.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan the UVEX Motorized resolve the Balmer series in the 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 a bright A-type star with very prominent hydrogen absorption lines (the Balmer series). Using one of the narrower slits, such as the \u003cstrong\u003e25µm or 50µm\u003c\/strong\u003e option, the UVEX can easily achieve the resolution needed to clearly separate and study these lines, from H-alpha in the red down to the higher-order lines in the blue and near-UV portion of its 350 nm to 1µm range.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat does the motorized focus on the UVEX Motorized adjust?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe motorized focus adjusts the internal optics of the spectroscope to ensure the spectrum is perfectly sharp on your camera's sensor. This is critical for achieving the highest possible resolution and is especially useful for compensating for small thermal shifts in focus over the course of a long observing night.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the USIS communication protocol difficult to use for custom software?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe USIS protocol is designed to be straightforward for developers. Shelyak provides documentation for the protocol, allowing programmers to integrate UVEX control into various platforms. While it requires some programming knowledge, it is a well-defined serial communication protocol, making it accessible for those familiar with creating ASCOM drivers or scripting with languages like Python.\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, and 25µm 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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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":9205.0,"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\u003eEnables construction of the STAROS Projects SUNSCAN spectroheliograph\u003c\/li\u003e\n\u003cli\u003eAllows solar imaging at user-selected wavelengths\u003c\/li\u003e\n\u003cli\u003eProvides the core optical components for the project\u003c\/li\u003e\n\u003cli\u003eCompleted instrument is controllable via smartphone or tablet\u003c\/li\u003e\n\u003cli\u003eDesigned for advanced DIY astronomy projects\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\u003eOptical kit for SUNSCAN spectroheliograph by STAROS Projects\u003c\/h2\u003e\n      \u003cp\u003eThis is the core optical kit for the innovative SUNSCAN spectroheliograph from STAROS Projects. It provides the essential optical elements required to construct a modern, stand-alone instrument capable of imaging the Sun in any wavelength you choose. Once assembled, the complete SUNSCAN system is designed to be controlled wirelessly through a dedicated smartphone or tablet application, bringing advanced solar analysis into the hands of the dedicated amateur.\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\u003eBuild a Custom-Wavelength Solar Spectroheliograph\u003c\/h3\u003e\n      \u003cp\u003eA spectroheliograph builds a monochromatic image of the Sun by scanning it, slit by slit, capturing only the light from a specific spectral line. This kit is the foundation of that capability, enabling you to assemble an instrument that goes beyond common H-alpha or Calcium-K filters to explore other interesting lines like Sodium D or Helium D3.\u003c\/p\u003e\n      \u003cp\u003eBy undertaking the SUNSCAN project, you can create a highly specialized solar telescope tailored to your specific research or imaging interests. The finished instrument allows you to see solar features like prominences, filaments, and plage with unique contrast depending on the wavelength selected.\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\u003eThe Optical Foundation for Your SUNSCAN Project: What's Required\u003c\/h3\u003e\n      \u003cp\u003eThis product provides the specialized optical components only. It is intended for the dedicated hobbyist ready to take on a rewarding DIY project. To complete the SUNSCAN spectroheliograph, you will need to source several other components separately.\u003c\/p\u003e\n      \u003cp\u003ePlease be aware that this kit does not include the 3D-printed structural parts, focuser, imaging camera, Raspberry Pi 4 controller, tripod, or other complementary hardware. These items must be acquired independently to complete the instrument as designed by STAROS Projects.\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 exactly is in the SUNSCAN Optical Kit?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis kit contains only the core optical elements required for the STAROS Projects SUNSCAN spectroheliograph. It is not a complete instrument. You will need to supply all mechanical parts, electronics, and hardware separately.\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 full SUNSCAN spectroheliograph?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eTo complete the project, you must source several items independently. Key components not included are:\u003c\/p\u003e\n    \u003cul\u003e\n        \u003cli\u003e\n\u003cstrong\u003e3D-Printed Parts:\u003c\/strong\u003e The main body and structure of the instrument.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eElectronics:\u003c\/strong\u003e A Raspberry Pi 4 (RP4) for control, plus an imaging camera.\u003c\/li\u003e\n        \u003cli\u003e\n\u003cstrong\u003eHardware:\u003c\/strong\u003e A focuser, tripod, and various fasteners.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eIs the SUNSCAN project suitable for a beginner?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThis is an advanced DIY project best suited for experienced astronomical instrument makers and solar imagers. It requires sourcing parts, 3D printing, and assembling electronic and optical components. Familiarity with spectrograph principles is highly recommended.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eHow is the completed SUNSCAN instrument controlled?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe SUNSCAN spectroheliograph is designed by STAROS Projects to be a stand-alone unit. It is controlled wirelessly via a dedicated application on a smartphone or tablet, which communicates with the onboard Raspberry Pi 4.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the SUNSCAN to image in the H-alpha line?\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. You can configure the instrument to image in the hydrogen-alpha line (656.3 nm) as well as other spectral lines of interest, such as Calcium-K, Helium D3, or Sodium D lines.\u003c\/p\u003e\n  \u003c\/div\u003e\n    \u003cdiv class=\"DAV-accordion\"\u003e\n    \u003ch3 class=\"DAV-accordion-Q\"\u003eWhere can I find the plans for the 3D-printed parts for the SUNSCAN project?\u003c\/h3\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"DAV-accordion-A\"\u003e\n    \u003cp\u003eThe design for the SUNSCAN is an open-source project from STAROS Projects. You should refer to their official project page or community forums for the latest STL files and assembly instructions.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cp\u003eThis product is covered by the standard David Astro warranty. Please contact us for more details.\u003c\/p\u003e\n\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\u003c\/li\u003e\n\u003cli\u003eTunable across the 400 nm to 700 nm visible spectrum\u003c\/li\u003e\n\u003cli\u003eInternal optical reduction ratio of 125:80\u003c\/li\u003e\n\u003cli\u003eBased on the open-source Sol'Ex project 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\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 Sol’Ex spectroheliograph\u003c\/h2\u003e\n\u003cp\u003eThis optical kit provides the core components to build your own Sol'Ex, an instrument capable of achieving an incredible 0.03 nm resolution for solar imaging. The system operates across the entire visible spectrum from 400 nm to 700 nm, utilizing an internal reduction ratio of 125:80 designed for the 3D-printed instrument body. With this kit, you can construct a spectroheliograph that reveals the Sun's chromosphere with contrast far exceeding that of standard commercial filters.\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\u003eUnlocking the Chromosphere with 0.03 nm Resolution\u003c\/h3\u003e\n\u003cp\u003eThe defining feature of the Sol'Ex is its spectral resolving power. This kit enables a resolution of 0.03 nm (equivalent to 0.3 Ångströms), an extremely narrow bandpass that isolates specific spectral lines with exceptional purity. This allows you to produce high-contrast images of chromospheric features like filaments, prominences, and plage that are often washed out by broader, more common solar filters.\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 400 nm to 700 nm Window on Solar Activity\u003c\/h3\u003e\n\u003cp\u003eUnlike fixed-wavelength filters, the Sol'Ex design allows you to image the Sun at any wavelength within the 400 nm to 700 nm range. You are not limited to just Hydrogen-alpha; you can capture images in Sodium (Na D), Helium (He D3), Hydrogen-beta, and more, revealing different layers and activity in the solar atmosphere. The instrument works as a spectroheliograph, scanning the solar disk and using the included software to reconstruct a detailed monochromatic 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\u003eA 125:80 Optical Core for the Sol'Ex and Star'Ex Projects\u003c\/h3\u003e\n\u003cp\u003eThis kit contains the essential optics—slit, grating, lenses—to serve as the heart of your 3D-printed Sol'Ex. The 125:80 internal reduction ratio is specified for the build files developed by Christian Buil, ensuring compatibility. Please note that this is a DIY project; you must source the 3D-printed parts and other components like cameras and adapters separately. For those interested in stellar science, this same optical core can be converted into a high-resolution stellar spectrograph, Star'Ex, with a complementary optical 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 else do I need to build a complete Sol'Ex with this 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 components\u003c\/strong\u003e. To complete the Sol'Ex, you will need to source the 3D-printed housing parts (STL files are available on the Sol'Ex project website) and other hardware, including an imaging camera, a guiding camera, and telescope adapters.\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 to be mounted on a small telescope. To see the entire solar disk in a single image scan, a telescope with a focal length of \u003cstrong\u003e450mm or less\u003c\/strong\u003e is recommended. Using a telescope with a longer focal length is possible and will yield more detailed images of specific regions on the Sun, but you will not capture the full disk.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow does the Sol'Ex's 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\u003eThe \u003cstrong\u003e0.03 nm (0.3 Å)\u003c\/strong\u003e resolution of the Sol'Ex is significantly narrower than most commercially available solar filters. For comparison, many high-end amateur H-alpha filters have a bandpass of 0.05 nm to 0.07 nm (0.5 Å to 0.7 Å). This narrower bandpass is what allows the Sol'Ex to produce images with superior contrast on fine chromospheric details.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I image prominences in H-alpha with the Sol'Ex optical kit?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. Once you build the Sol'Ex and tune it to the Hydrogen-alpha wavelength (656.3 nm), its high resolution and contrast are ideal for capturing detailed images of solar prominences against the dark sky, as well as filaments on the solar disk itself.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs it difficult to process the images from the Sol'Ex?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe Sol'Ex project includes dedicated software designed for automatic image processing. The instrument captures data by scanning the Sun, and the software then reconstructs the final, high-contrast monochromatic image from this data, making the process straightforward.\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, which are available in a separate complementary kit (Star’Ex HR complementary kit). This allows you to use the same core instrument to analyze the spectra of stars.\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 – 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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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 Optical kit for Star'Ex HR spectrograph provides the core components to build a powerful scientific instrument 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, and features an internal reduction ratio of 125:80, optimized for popular imaging cameras.\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 the advanced amateur who wishes to build their own 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 design's 125:80 internal reduction ratio is engineered to match the optical system to common sensor sizes, ensuring efficient light collection. 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 spectroscopy of point-like or dimmer deep-sky objects. 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 to source the 3D-printed body, all necessary screws and hardware, a guiding camera, 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\u003eNo, the Star'Ex HR is specifically designed for nighttime targets like stars and nebulae. It is not configured for solar observation, which requires the specific setup and safety features of the Sol'Ex project. This kit is intended to build a separate, high-resolution instrument for stellar spectroscopy.\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\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\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003eThis kit contains only the required optical elements, including mirrors, lenses, grating, and the GEN 2 slit. 3D-printed parts, mechanical hardware, adapters, and cameras are not included and must be sourced separately.\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":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\u003eDesigned as the optical core for a DIY 3D-printed spectrograph\u003c\/li\u003e\n\u003cli\u003eFeatures an internal focal reduction ratio of 125:80\u003c\/li\u003e\n\u003cli\u003eIncludes the latest GEN 2 slit for improved 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 - complete set\u003c\/h2\u003e\n\u003cp\u003eThis optical kit for the Star'Ex HR spectrograph provides the core components for a high-resolution, 3D-printed instrument capable of achieving a spectral resolution from R=700 to R=30,000. It operates across the visible spectrum from 400 nm to 700 nm and features an internal reduction ratio of 125:80, allowing you to capture detailed spectral profiles of stars, nebulae, and other bright 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\u003eBuild the R=30,000 Star'Ex HR Spectrograph\u003c\/h3\u003e\n\u003cp\u003eThis kit contains the essential optical elements to construct your own Star'Ex High Resolution (HR) spectrograph, a project designed by Christian Buil. It enables the detailed study of stellar spectra, revealing chemical compositions and radial velocities with a precision determined by your choice of slit width, reaching up to an impressive R=30,000.\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\u003eVariable Spectral Resolution from R=700 to R=30,000\u003c\/h3\u003e\n\u003cp\u003eThe Star'Ex HR's primary strength is its adaptability. By swapping slits, you can adjust the spectral resolution from R=700 for quick surveys of fainter objects to an extremely high R=30,000 for resolving fine details in the spectral lines of bright stars. The operational wavelength range of 400 nm to 700 nm ensures full coverage of the visible spectrum, from deep violet to 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\u003eA 125:80 Ratio Foundation for Your 3D-Printed Spectrograph\u003c\/h3\u003e\n\u003cp\u003eEngineered as the heart of a DIY project, this kit is fully compatible with the 3D printing files available on Christian Buil’s website and mechanical kits from Azur3dPrint. The internal 125:80 reduction ratio is a key design parameter for matching your telescope's focal ratio to your imaging camera. Please note this is an opticals-only kit; it does not include any 3D-printed parts, mechanical hardware, adapters, or cameras.\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 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. This instrument is used to analyze the light from celestial objects like stars and nebulae, splitting it into a spectrum to study their chemical composition, temperature, and motion.\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\u003eopticals-only kit\u003c\/strong\u003e. To complete the project, you will need to source or fabricate the following items separately:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3D-Printed Body:\u003c\/strong\u003e Files are available from Christian Buil's website.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Parts:\u003c\/strong\u003e Screws and other hardware, potentially available in kits from vendors like Azur3dPrint.\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\u003eImaging and Guiding Cameras:\u003c\/strong\u003e A main camera for capturing the spectrum and potentially a second for guiding.\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\u003eThe spectral resolution (R) is directly dependent on the width of the entrance slit. The Star'Ex HR design allows you to use different slits. A very narrow slit is used to achieve the highest resolution of \u003cstrong\u003eR=30,000\u003c\/strong\u003e, which allows for extremely fine detail in the spectrum, though it requires a brighter target and good seeing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat details 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\u003eWith the Star'Ex HR at high resolution, you can easily resolve the deep, broad absorption lines of the Balmer series (Hydrogen-alpha, beta, gamma) in Vega's spectrum. At the highest resolutions, you may also be able to detect much finer metallic lines and study the precise profile of the hydrogen lines to understand the star's atmospheric properties.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWill the Star'Ex HR kit work with my 8\" f\/10 Schmidt-Cassegrain telescope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, the Star'Ex HR is well-suited for common telescopes like an 8\" f\/10 SCT. The spectrograph's internal \u003cstrong\u003e125:80 reduction ratio\u003c\/strong\u003e helps to optimize the focal ratio for the camera sensor, which is beneficial when starting with a longer f-ratio telescope. You will need to ensure you have the correct adapters to physically connect the spectrograph to your telescope's visual back.\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 that the human eye can see. It allows you to study many of the most important spectral features, including:\n\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHydrogen-alpha (656 nm) and Hydrogen-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 stars like our Sun.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCalcium H \u0026amp; K lines (~393-397 nm)\u003c\/strong\u003e at the very edge of the violet range.\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\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 – 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\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\"\u003eComplete Optical Element Set for Star'Ex HR\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003eIncludes all mirrors, lenses, grating, and slit required for the project.\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\u003e1:1 internal reduction ratio simplifies 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\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\u003c\/h2\u003e\n\u003cp\u003eThis optical kit provides the core components to build your own Star'Ex Low Resolution spectroscope, an instrument capable of a resolution of R=650 for analyzing faint deep-sky objects across the 400 nm to 700 nm visible spectrum. Based on a 1:1 internal ratio with an 80 mm focal length for both the collimator and objective, this kit is the starting point for a powerful DIY scientific instrument.\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 Spectroscope: An R=650 Faint Object Instrument\u003c\/h3\u003e\n\u003cp\u003eDesigned for the amateur astronomer ready for a rewarding project, this kit enables the construction of a spectroscope optimized for faint targets like nebulae, galaxies, and distant stars. With a resolving power of R=650, you can capture distinct spectral features, allowing for scientific analysis from a backyard observatory. The design is fully compatible with the 3D printing files developed by Christian Buil, creating a clear and proven path from components to a functional instrument.\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 400-700 nm Visible Spectrum Optical Path\u003c\/h3\u003e\n\u003cp\u003eThis kit is configured for spectroscopy in the visible range, from the violet edge at 400 nm to deep red at 700 nm. The included GEN 2 slit ensures precise light injection into the optical path. This wavelength range covers critical emission and absorption lines used to classify stars and analyze the composition of 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 80mm Focal Length System: What You Need to Complete It\u003c\/h3\u003e\n\u003cp\u003eThe Star'Ex optical design uses an 80 mm focal length for both the collimator and objective, creating a simple and efficient 1:1 system. This optical kit contains only these core optical elements. To complete the spectroscope, you must source all other components separately.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3D-Printed Parts:\u003c\/strong\u003e The main body of the spectroscope must be 3D printed using the files available on Christian Buil’s website.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical Hardware:\u003c\/strong\u003e Fasteners, adapters, and other mechanical components, such as those offered by Azur3dPrint, are required for assembly.\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCameras:\u003c\/strong\u003e You will need to provide your own science camera for capturing spectra and potentially a separate guide camera.\n\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 included in the 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 does not include the 3D-printed housing, mechanical screws, camera adapters, or any cameras. You are purchasing the specialized lenses, gratings, and slit needed for the project.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of resolution can I expect with the 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 650 nm when using a 23-micron slit. This is considered low-to-medium resolution, ideal for capturing the spectra of faint objects where collecting maximum light is a priority.\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 website.\u003c\/li\u003e\n\u003cli\u003eA mechanical kit with all necessary screws and hardware (e.g., from Azur3dPrint).\u003c\/li\u003e\n\u003cli\u003eA telescope adapter to connect the Star'Ex to your telescope.\u003c\/li\u003e\n\u003cli\u003eA science camera for recording the spectrum.\u003c\/li\u003e\n\u003cli\u003e(Optional) A guiding camera and module for long exposures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eHow would the Star'Ex LR perform 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\u003eThe Star'Ex LR is well-suited for targets like the Orion Nebula (M42). Its R=650 resolution is sufficient to clearly separate the main emission lines, such as Hydrogen-alpha, Hydrogen-beta, and the two Oxygen-III lines, allowing you to analyze the physical conditions within the nebula.\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 to study the spectrum of a galaxy like Andromeda (M31) with an 8\" SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, but it will be challenging. While the Star'Ex LR is designed for faint objects, a galaxy's light is spread out, making its surface brightness very low. You would need to target the bright core of M31 and use long exposures. The resulting spectrum will be continuous, showing the combined light of billions of stars, and you may be able to detect redshift with careful measurement.\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 - 700 nm). Shelyak offers a separate, complementary optical kit to modify the Star'Ex LR for near-infrared (IR) observations from 650 nm to 1000 nm.\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 with a 23-micron slit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWavelength Range\u003c\/td\u003e\n\u003ctd\u003e400 nm – 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\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'Ex LR Spectroscope Optical Element Set\u003c\/p\u003e\n\u003cp class=\"DAV-item-subtitle\"\u003eThis kit contains only the optical components. 3D-printed parts are not included.\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\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 spectrographs 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 spectroscopy 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\u003c\/tbody\u003e\n\u003c\/table\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":52943034384669,"sku":"SHK-OP0024","price":1009.0,"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\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 diffraction grating 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 spectroscopy, 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\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\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":52943034614045,"sku":"SHK-OP0094","price":113.0,"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\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 spectrograph. 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 guiding camera (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 spectroscopy 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\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\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":52943034843421,"sku":"SHK-PF0008","price":4959.0,"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\u003eSpectral Range: 390nm to 750nm\u003c\/li\u003e\n\u003cli\u003eInstrument Type: Professional Echelle Spectroscope\u003c\/li\u003e\n\u003cli\u003eInput: Fiber-Optic Fed\u003c\/li\u003e\n\u003cli\u003eDesign: Modular Core Component\u003c\/li\u003e\n\u003cli\u003eApplication Focus: High-Resolution Astrophysical Analysis\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\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\u003eeShel III Spectroscope\u003c\/h2\u003e\n\u003cp\u003eThe Shelyak eShel III is a professional, fiber-fed echelle spectrograph designed for high-resolution analysis across a wide spectral range of 390nm to 750nm, enabling advanced research in topics such as exoplanetary science and stellar dynamics.\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\u003eProfessional Echelle Spectroscopy from 390nm to 750nm\u003c\/h3\u003e\n\u003cp\u003eThe eShel III achieves its high resolving power by employing an echelle grating, which uses high diffraction orders to spread light out in great detail. A cross-disperser prism then slices this spectrum into successive orders, stacking them to fill the entire surface of a camera sensor. This technique allows the instrument to capture the complete visible spectrum from 390nm to 750nm in a single exposure, without sacrificing resolution at any point in the range.\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\u003eFiber-Fed Design for High-Accuracy Radial Velocity\u003c\/h3\u003e\n\u003cp\u003ePrecision is paramount in spectroscopy, especially for radial velocity measurements used to detect exoplanets. The eShel III uses a fiber-optic feed to physically decouple the spectrograph from the telescope. This isolates the instrument from mechanical vibrations, flexure, and thermal fluctuations at the telescope, allowing it to be housed in a stable, temperature-controlled environment. This stability is the key to achieving the consistent, repeatable measurements required for professional research.\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 III Core: Building a Complete Spectrographic System\u003c\/h3\u003e\n\u003cp\u003eThis product is the core eShel III spectroscope module and is not a standalone instrument. To create a fully operational system, it must be paired with a Fiber Injection and Guiding Unit (FIGU), a dedicated calibration module, and the required 50µm optical fibers for the target and calibration source. These components are available separately or as part of the complete eShel III system package. The entire system is controlled by the free Demetra software, which handles acquisition, remote control of the modules, and data reduction.\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 III designed this way?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eAn \u003cstrong\u003eechelle spectroscope\u003c\/strong\u003e uses a special grating at a high angle to achieve very high spectral resolution. This creates overlapping spectral orders, which a second optical element (a cross-disperser) separates and stacks vertically on the sensor. This design allows the eShel III to capture a very wide spectral range (390nm to 750nm) at high resolution in a single image, something a traditional single-order spectrograph cannot do.\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 eShel III Spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe eShel III Spectroscope is the central module of a larger system. For operation, you will require:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eA \u003cstrong\u003eFiber Injection \u0026amp; Guiding Unit (FIGU)\u003c\/strong\u003e to inject the 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 (one for the star, one for calibration).\u003c\/li\u003e\n\u003cli\u003eA compatible astronomical camera, such as the ATIK 460Ex.\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 fiber-fed design of the eShel III improve data quality for exoplanet hunting?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eDetecting the tiny Doppler shift in a star's light caused by an orbiting exoplanet requires extreme stability. By using an optical fiber, the \u003cstrong\u003eeShel III can be placed in a temperature-controlled room\u003c\/strong\u003e, completely isolated from the telescope's movement, vibrations, and changing orientation. This prevents instrumental shifts that could mimic or mask the real stellar signal, ensuring the measured radial velocity is highly accurate.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the eShel III for studying the spectral evolution of a variable star like BW Vulpeculae?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes, absolutely. The eShel III is ideal for this type of research. Its ability to capture the entire visible spectrum at high resolution in a single exposure allows you to monitor changes in multiple spectral lines simultaneously over time. This is crucial for understanding the complex atmospheric pulsations and dynamics of stars like the Beta Cephei variable BW Vulpeculae.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat software is required to control the eShel III and its modules?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe entire eShel III system is controlled by Shelyak's \u003cstrong\u003eDemetra software\u003c\/strong\u003e, which is available as a free download. Demetra manages spectra acquisition, controls the FIGU and calibration modules remotely, and includes tools for data reduction, from raw images to calibrated spectra.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eIs the eShel III 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 \u003cstrong\u003ecore spectroscope module only\u003c\/strong\u003e. It is designed to be the heart of a complete spectrographic system and requires the additional components listed above for operation. Shelyak offers a complete package that includes all necessary modules for a functioning instrument.\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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\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 spectroscopy, 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 spectroscopes, this unit automates the entire calibration process. It allows you to acquire precise wavelength references and correct for instrument signatures remotely, ensuring your scientific data is both accurate and repeatable.\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. The internal flat lamp illuminates the entire optical path, allowing you to create master flat fields to correct for pixel-to-pixel variations in the sensor and remove artifacts like dust shadows.\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 and a \u003cstrong\u003eflat lamp\u003c\/strong\u003e for creating flat-fields to correct for detector and optical path imperfections.\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\n\u003cstrong\u003eFlat Lamp:\u003c\/strong\u003e Provides a uniform, featureless light source. This reveals pixel sensitivity differences, vignetting, and the location of dust on your optics, allowing these effects to be mathematically removed from your science images.\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 flat lamp corrects instrumental signatures, ensuring the spectral profile you record is that of the star, not your equipment. 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, Flat Lamp\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\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\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":52943035564317,"sku":"SHK-PF0012","price":7882.0,"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 spectrograph. 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 spectroscopy.\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 guiding camera (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 specifically for telescopes with slower focal ratios like Schmidt-Cassegrains or Maksutov-Cassegrains. 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 do I need the F\/9 version of the FIGU instead of the F\/6 version for my SCT?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eStandard Schmidt-Cassegrain Telescopes (SCTs) typically operate around f\/10, very close to F\/9. 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 these systems.\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 C8 at F\/9?\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":6168.0,"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 spectrograph'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 spectroscopy, 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. The manufacturer specifies that 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\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\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":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 spectroscopy of faint deep-sky objects\u003c\/li\u003e\n\u003cli\u003eFast optical design optimized for modern telescopes\u003c\/li\u003e\n\u003cli\u003eInterchangeable slits to balance resolution and brightness\u003c\/li\u003e\n\u003cli\u003eMirror slit design for accurate target acquisition and guiding\u003c\/li\u003e\n\u003cli\u003eLightweight 1.4 kg chassis\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\u003eLISA Spectroscope (VIS)\u003c\/h2\u003e\n\u003cp\u003eThe LISA Spectroscope is a lightweight 1.4 kg instrument designed for the scientific analysis of faint celestial objects from comets to quasars. It features a 4 mm long slit and an optical system with custom-made components, enabling you to capture detailed spectra of targets like novae, supernovae, and the redshift of distant galaxies.\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\u003eEngineered for Faint Object Spectroscopy\u003c\/h3\u003e\n\u003cp\u003eThe LISA's optical path is specifically engineered for low-light targets. Its fast focal ratio makes it an ideal match for telescopes operating natively at f\/5, or for Schmidt-Cassegrain and Ritchey-Chrétien systems paired with a focal reducer. This design maximizes throughput for challenging subjects such as faint variable stars or confirming planetary nebulae.\u003c\/p\u003e\n\u003cp\u003eWith a resolving power of approximately 1,000, the LISA separates spectral lines with enough detail for serious scientific work. Its spectral range covers the entire visible spectrum and extends into the near-ultraviolet and near-infrared, providing broad coverage for a wide variety of astronomical 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\u003eMirror Slit and Interchangeable Slits\u003c\/h3\u003e\n\u003cp\u003eAcquiring and holding a faint object on a narrow slit is a primary challenge in spectroscopy. The LISA incorporates a mirror slit that allows you to see the entire starfield, making it simple to accurately position your target. For long exposures, a C-mount guide port allows you to connect an autoguiding camera to maintain perfect tracking.\u003c\/p\u003e\n\u003cp\u003eTo adapt to different targets and conditions, the LISA includes a standard set of four interchangeable slits (15, 19, 23, and 35µm). This allows you to prioritize high resolution for brighter objects or greater light throughput for the faintest targets. Additional specialized slits, such as wide or photometric versions, are available separately to further expand the instrument's capabilities.\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\u003eStandardized Telescope and Camera Interfaces\u003c\/h3\u003e\n\u003cp\u003eThe LISA connects to your telescope via a standard 2\" nosepiece, which is included. This nosepiece can be removed to expose a female M42x0.75 T-thread for more rigid connections. The imaging camera also connects via a T-thread, with a backfocus of 54.9 mm to accommodate filter wheels and other accessories.\u003c\/p\u003e\n\u003cp\u003eThe dedicated guiding camera port uses a standard C-mount thread with a 17.5 mm backfocus. For users of ATIK cameras, the LISA also includes a 13 mm T-thread extension ring to ensure the sensor is placed at the correct distance from the optics.\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 LISA Spectroscope designed for?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LISA Spectroscope is optimized for faint deep-sky objects. Its primary targets include \u003cstrong\u003ecomets, novae, supernovae, faint variable stars, distant galaxies, and quasars\u003c\/strong\u003e. It is an ideal instrument for pro-am research and scientific characterization of these challenging targets.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eWhat kind of telescope do I need to use the LISA Spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LISA performs best with telescopes that have a fast focal ratio, around f\/5. It can be used directly on instruments with this native focal ratio. For telescopes with longer focal ratios, such as most \u003cstrong\u003eSchmidt-Cassegrains or Ritchey-Chrétiens (f\/8 to f\/10)\u003c\/strong\u003e, you will need to use a \u003cstrong\u003efocal reducer\u003c\/strong\u003e to achieve optimal performance.\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 LISA Spectroscope's slit for long exposures?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eThe LISA Spectroscope features two key systems for this. First, its \u003cstrong\u003emirror slit\u003c\/strong\u003e allows you to see the starfield around the slit for easy initial positioning. Second, it has a dedicated \u003cstrong\u003eC-mount guide port\u003c\/strong\u003e, allowing you to attach an autoguiding camera that sends corrections to your mount, keeping the target perfectly centered automatically.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I change the resolution of the LISA Spectroscope?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eYes. The LISA comes with a set of four interchangeable slits of different widths. Using a narrower slit provides higher spectral resolution, which is ideal for separating close spectral lines on brighter targets. A wider slit allows more light to pass through, which is better for capturing a signal on 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 LISA Spectroscope to study a supernova like SN 2023ixf in the Pinwheel Galaxy (M101)?\u003c\/h3\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion-A\"\u003e\n\u003cp\u003eFor a faint target like a supernova in a distant galaxy, you would likely select one of the wider slits (e.g., 23µm or 35µm) to maximize light throughput. You would use the mirror slit to locate the supernova within M101 and position it precisely. For the necessary long exposures, an autoguiding camera attached to the C-mount port would be essential to ensure the target does not drift off the slit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"DAV-accordion\"\u003e\n\u003ch3 class=\"DAV-accordion-Q\"\u003eCan I use the LISA Spectroscope 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 two accessories for optimal results. First, you'll need a \u003cstrong\u003efocal reducer (e.g., 0.63x or 0.5x)\u003c\/strong\u003e to shorten your SCT's focal ratio to be closer to f\/5. Second, for a secure mechanical connection to the SCT's rear cell, you will need a specific adapter like the Shelyak BA0027 variable T-adapter instead of the standard 2\" nosepiece.\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\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\"\u003e13mm T-thread Extension Ring (for ATIK cameras)\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_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":6882.0,"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 eyepiece, 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 spectroscopy 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 contains a diffraction grating that splits light 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":186.0,"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, and LHIRES III\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\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 internal calibration lamps for Alpy 600, LISA, and LHIRES III spectrographs, 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 spectrograph's two essential calibration sources: the internal 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 diagnostic red LED on the unit provides immediate visual feedback if one of the lamps is faulty.\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 pier or other nearby location. Please note that the Spox Module requires a 12V power supply, 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 internal calibration lamps. 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, LISA, 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\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 (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\u003c\/tbody\u003e\n\u003c\/table\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":52943039004957,"sku":"SHK-PF0045","price":458.0,"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 spectroscopy 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 spectroscope 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\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 spectroscopy. 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 spectroscope.\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\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\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":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 spectroscope 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 spectroscopy 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\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\u003eAdds only 1.46 kg to the UVEX assembly (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 spectrograph into a fully remote instrument, adding just 1.46 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 1.46 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 1.46 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 third-party observatory software like N.I.N.A. or SGP via custom drivers.\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 1.46 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\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 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\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":2453.0,"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\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\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/li\u003e\n\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\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":52943040315677,"sku":"SHK-PF0081","price":270.0,"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\/collections\/shelyak.oembed?page=4","provider":"David Astro","version":"1.0","type":"link"}