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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 Grating module for the UVEX - 1200 l/mm

Shelyak Grating module for the UVEX - 1200 l/mm

by Shelyak
SKU SHK-SE0245
$719.00 - $719.00
$719.00
$719.00 - $719.00
$719.00
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  • 1200 lines/mm Grating Density
  • Designed for the Shelyak UVEX Spectroscope
  • Enables High-Resolution Spectroscopy
  • User-Interchangeable Module
  • Doubles Resolution of Standard Grating
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  • Description
  • FAQ
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  • Warranty

  • Grating module for the UVEX - 1200 l/mm

    This optional 1200 lines/mm grating module for the Shelyak UVEX spectroscope is engineered specifically for high-resolution applications. It directly replaces the standard 600 l/mm grating supplied with the UVEX, effectively doubling the instrument's native spectral resolving power for detailed scientific analysis.

    High-Resolution Spectroscopy with the 1200 l/mm Grating

    Increasing a spectroscope's line density from 600 l/mm to 1200 l/mm allows you to resolve finer details within a star's spectrum. This is critical for advanced projects such as monitoring the emission line profile changes in Be stars, measuring small Doppler shifts in spectroscopic binaries, or separating closely spaced absorption lines in stellar atmospheres.

    By spreading the light over a greater angle, the 1200 l/mm grating makes these subtle spectral features large enough for your camera sensor to detect. This module transforms the UVEX into an instrument capable of contributing to pro-am research campaigns that require higher resolving power than the stock configuration can provide.

    Choosing Your Grating: 1200 l/mm vs. the 600 l/mm Standard

    The primary trade-off for higher resolution is a reduction in the spectral range captured in a single exposure. While the standard 600 l/mm grating provides a balanced view of a wide wavelength range, the 1200 l/mm grating focuses on a smaller segment of the spectrum with significantly greater detail.

    • 1200 l/mm Grating: Choose this for targeted studies of specific spectral lines (like H-alpha or Sodium D-lines) where maximum detail is the goal.
    • 600 l/mm Grating (Standard): Ideal for general stellar classification and capturing broad spectral features across a wide range of wavelengths in one shot.
    • Lower Density Gratings (e.g., 300 l/mm): Best for low-resolution survey work, classifying faint objects like supernovae, or capturing the entire visible spectrum of a star at once.

  • What is the main advantage of the Shelyak 1200 l/mm grating over the standard 600 l/mm grating?

    The primary advantage is doubled spectral resolution. The 1200 l/mm grating spreads light out more, allowing you to see finer details and separate spectral lines that would appear blended together with the standard 600 l/mm grating. This is essential for detailed scientific analysis of specific spectral features.

    When should I use a lower resolution grating instead of this 1200 l/mm module for the UVEX?

    Use a lower-density grating (like the optional 300 l/mm or 150 l/mm) when your priority is capturing the widest possible wavelength range in a single image, or when observing very faint objects. Lower resolution concentrates the light, improving the signal-to-noise ratio for targets like quasars, comets, or faint supernovae where detailed line profiles are less critical than initial classification.

    Can I use the 1200 l/mm UVEX grating to study the H-alpha line of Be stars?

    Yes, this is an ideal application. The high resolution of the 1200 l/mm grating is perfectly suited for resolving the complex and variable emission profiles of the H-alpha line in Be stars. This allows you to track changes in the star's circumstellar disk, which is a key area of pro-am collaborative research.

    How does the 1200 l/mm grating affect the wavelength range I can capture with the UVEX?

    The 1200 l/mm grating significantly narrows the spectral range that fits onto your camera's sensor in a single exposure compared to the 600 l/mm grating. You will be capturing a smaller slice of the spectrum, but with much greater detail within that slice. You may need to take multiple exposures, rotating the grating slightly between each, to cover a wider region of interest.

    Is installing the 1200 l/mm grating module in the UVEX spectroscope difficult?

    No, the UVEX is designed for interchangeable gratings. The modules are made to be easily swappable by the user, allowing you to change the resolution of the spectroscope in the field to match your observing target and scientific goals for the night.

    What kind of telescope is best for high-resolution spectroscopy with the UVEX and the 1200 l/mm grating?

    High-resolution spectroscopy requires a strong signal. Therefore, telescopes with larger apertures (typically 8" or greater) are recommended to gather enough light, especially for fainter stars. Schmidt-Cassegrains (SCTs) and Ritchey-Chrétiens (RCs) are common choices due to their large apertures and comfortable back focus, which easily accommodates the spectroscope.

  • Grating Density 1200 lines/mm
    Compatibility Shelyak UVEX Spectroscope
  • Shelyak 1-Year Warranty