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IMPORTANT: Our store is located in Canada. All orders that include products manufactured outside of Canada or USA will be subject to tariffs and duties, regardless of the order value. US customers are responsible for all applicable duties and tariffs, and those will be billed by the carrier, except for the Lacerta upgrade kit, for which we collect them at checkout.
Shelyak Lhires III Spectroscope
Shelyak Lhires III Spectroscope
Shelyak Lhires III Spectroscope
Shelyak Lhires III Spectroscope

Shelyak Lhires III Spectroscope

par Shelyak
UGC SHK-ES0002
$5,359.00 - $5,359.00
$5,359.00
$5,359.00 - $5,359.00
$5,359.00
Égalisation de prix!
  • High-Resolution Spectroscopic Analysis
  • Optimized for Schmidt-Cassegrain Telescopes
  • Integrated C-Mount Guide Port (0.8x)
  • Mirror Slit for Precise Target Acquisition
  • Compact and Lightweight at 1.7 kg
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  • Description
  • FAQ
  • Specifications
  • Downloads
  • Warranty

  • Lhires III Spectroscope

    The 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.

    Guiding & Slit Design: 0.8x C-Mount Port and 17.5mm Back Focus

    The 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.

    Physical Build: A Compact 1.7 kg, 250mm x 200mm x 83mm Chassis

    Engineered 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.

    High-Resolution Science: Doppler Shift Analysis & Pro-Am Collaboration

    This 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.

    The 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.

  • What kind of telescope works best with the Lhires III Spectroscope?

    The 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.

    Can I use the Lhires III Spectroscope to measure the rotation of Jupiter?

    Yes. 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.

    What do I need to start autoguiding with the Lhires III?

    You will need a separate C-mount guide camera and autoguiding software. The Lhires III has a built-in guide port with a 0.8x focal reducer and 17.5 mm of backfocus. 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.

    How do I attach my imaging camera to the Lhires III Spectroscope?

    The 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.

    Is the Lhires III a good tool for studying Be stars?

    Absolutely. 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.

    How do I select a specific wavelength to observe with the Lhires III?

    The 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.

  • Guide Port Specifications Dual-lens C-mount with 0.8x focal reducer
    Guide Camera Back Focus 17.5 mm
    Weight 1.7 kg
    Dimensions 250 mm x 200 mm x 83 mm
    Detector Compatibility Accepts adaptor rings for CCD, CMOS, and DSLR cameras
  • Shelyak 1-Year Warranty