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Shelyak UVEX Spectroscope
Shelyak UVEX Spectroscope
Shelyak UVEX Spectroscope
Shelyak UVEX Spectroscope

Shelyak UVEX Spectroscope

by Shelyak
SKU SHK-ES0021
CA$7,814.00 - CA$7,814.00
CA$7,814.00
CA$7,814.00 - CA$7,814.00
CA$7,814.00
Price Match Policy!
  • Wide spectral range from 350 nm (UV) to 1 µm (IR)
  • Multi-position slit with 25µm, 50µm, 100µm, and 300µm options
  • Optimized for F/8 telescopes
  • Lightweight 1.2 kg body (without camera)
  • Includes a 600 lines/mm grating blazed at 500nm
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • UVEX Spectroscope

    The 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.

    Crossed Czerny-Turner Optics: 350nm to 1µm Spectral Range

    The 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.

    6-Position Slit and Interchangeable 600 tr/mm Grating

    Control 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.

    F/8 Optimization and Precise M2 Mirror Focusing

    The 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.

    Optional Motorization and Included 3.2 kg Padded Case

    Designed 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.

  • What type of telescope is best for the UVEX Spectroscope?

    The UVEX is optimized for an F/8 focal ratio, 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.

    How do I change the spectral resolution with the UVEX?

    You can adjust the resolution in two ways. First, by selecting a different slit width on the 6-position slit wheel; 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.

    Can the UVEX Spectroscope capture the spectrum of a star like Vega (Alpha Lyrae) in the UV?

    Yes. The UVEX has a spectral range extending down to 350 nm, 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.

    What camera do you recommend for the UVEX Spectroscope?

    Shelyak recommends the ZWO ASI533MM Pro 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.

    Is the UVEX difficult to focus?

    No, focusing is straightforward. The UVEX features a dedicated multi-turn knob 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.

    Can I operate the UVEX Spectroscope from a remote observatory?

    Yes. The UVEX is designed to be compatible with an optional motorization module. When installed, this allows for remote control of the grating angle and other functions, making it suitable for automated or remote observatories.

  • Spectral Range 350 nm to 1µm
    Slit Options Multi-position: 25µm, 50µm, 100µm, 300µm, 25µm hole, 3mm hole
    Optimal Telescope F/D F/8 (usable to F/5 with minor quality degradation)
    Dimensions 145 x 140 x 120 mm
    Weight (Spectroscope only) 1.2 kg
    Weight (with carrying case) 3.2 kg

    • UVEX Spectroscope

      × 1

    • Shockproof Carrying Case

      × 1

    • 600 tr/mm Grating

      × 1 (installed)

    • ZWO Camera Adapter Ring

      × 1

    • Phillips Screwdriver

      × 1

    • Plastic Vernier for 600 gr/mm Grating

      × 1

    • Bag of Spare Screws

      × 1

    • Autoguiding Module Screws

      × 4

  • Shelyak 1-Year Warranty