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Shelyak UVEX Spectroscope

SKU : SL-ES0021

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  • Recommended to use an ZWO ASI 183MM pro camera with the UVEX spectrograph
  • Optimized for wavelengths from near UV (<400nm) to near IR (1µm)

Product Details

  • This UVEX is a cross Czerny-Turner spectrograph optimized for wavelengths from near UV (<400nm) to near IR (1µm).

    It’s particularly designed to be used on Ritchey-Chretien type telescopes with diameters up to 12 or 14 inches (at F/8). It’s recommended to use an ZWO ASI 183MM pro camera with the UVEX spectrograph.

    The settings are precise and easily accessible:

    • A multi-turn knob adjusts the focus of the M2 internal mirror precisely.
    • An index is used to adjust the wavelength center of the spectrum on the camera sensor. A vernier (available for each type of grating) makes it possible to precisely position the grating at the desired wavelength.

    The UVEX is delivered with a 600 gr/mm grating blazed at 500nm as well as an adapter ring for ZWO cameras (others rings for QHY and ATIK cameras are also available in option).

    The spectrograph slit has 5 positions that can be easily changed using a Phillips screwdriver (supplied with the UVEX). The slit positions are 25 µm, 50 µm, 100µm, 300 µm and a hole of 25µm. Other slits are available as an option and Alpy slits are compatible with UVEX.


    • Cross Czerny-Turner spectrograph optical design
    • Spectral range: 350 nm to 1µm
    • Spectral resolution with a 600 gr/mm grating R=1700 @ 650nm
    • Multi position slit: 25µm, 50µm, 100µm, 300µm and a hole of 25µm
    • Optimal telescope F/d ratio: f/8
    • Compatible with ZWO, QHY et ATIK camera with a back focus <14mm
    • Dimensions: 145 x 140 mm Height = 120mm
    • Weight: 1.64 lbs (without camera)
    • UVEX weight & carrying case: 7.05 lbs

  • included items

    • A 600 gr/mm grating blazed at 500nm
    • A tool kit including a Phillips screwdriver, a hexagonal screwdriver (2mm), hexagonal wrenches (1.5, 2.5 and 3mm)
    • A bag of spare screws as well as 4 screws for fixing the autoguiding module on the UVEX
    • An adapter ring for ZWO cameras
    • A cardboard sheet of the various verniers printed
    • A plastic vernier for the 600 gr/mm grating
    • A rigid carrying case

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