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Spectroscopy

Spectroscopy splits starlight into its colours and turns your telescope into a physics instrument. With a spectrum you can classify stars by temperature, measure the expansion speed of a nova, watch emission lines change in Be stars, detect the redshift of a bright quasar or map the Sun in a single wavelength. It is one of the few areas where amateurs regularly contribute data to professional research.

We carry the Shelyak Instruments range from France: Star Analyser grating filters, the Alpy, LISA, UVEX, Lhires III and eShel spectrographs, Sol'Ex, SUNSCAN and Star'Ex optical kits, and the slits, gratings, calibration lamps, guiding units, fibres and adapters that go with them.

Filters

CA$305.00 - CA$305.00
CA$305.00
CA$305.00 - CA$305.00
CA$305.00

Shelyak Star Analyser 200

Instantly converts your imaging camera into a spectroscope Optimized for use in filter wheels close to the sensor Produces a low-resolution spectr...

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CA$305.00 - CA$305.00
CA$305.00
CA$305.00 - CA$305.00
CA$305.00
CA$265.00 - CA$265.00
CA$265.00
CA$265.00 - CA$265.00
CA$265.00

Shelyak Star Analyser 100

Turns any astronomy camera or DSLR into a spectroscope Installs as easily as a standard 1.25" filter High-efficiency transmission grating blazed f...

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CA$265.00 - CA$265.00
CA$265.00
CA$265.00 - CA$265.00
CA$265.00
CA$1,604.00 - CA$1,604.00
CA$1,604.00
CA$1,604.00 - CA$1,604.00
CA$1,604.00

Shelyak Alpy Guiding Module

Essential guiding accessory for Alpy 600 & UVEX spectroscopes Ensures precise centering of the target star on the spectroscope slit Utilizes a...

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CA$1,604.00 - CA$1,604.00
CA$1,604.00
CA$1,604.00 - CA$1,604.00
CA$1,604.00
CA$1,317.00 - CA$1,317.00
CA$1,317.00
CA$1,317.00 - CA$1,317.00
CA$1,317.00

Shelyak Alpy Calibration Module

Argon-Neon (Ar-Ne) calibration lamp for precise wavelength reference Tungsten-halogen lamp for creating flat-field frames Integrated dark frame mo...

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CA$1,317.00 - CA$1,317.00
CA$1,317.00
CA$1,317.00 - CA$1,317.00
CA$1,317.00
CA$1,389.00 - CA$1,389.00
CA$1,389.00
CA$1,389.00 - CA$1,389.00
CA$1,389.00

Shelyak Alpy 600 Spectroscope

Resolution Power of R~600 with the 25µm slit Spectral Resolution of approximately 1nm Fast F/4 optical design for high light throughput Multi-posi...

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CA$1,389.00 - CA$1,389.00
CA$1,389.00
CA$1,389.00 - CA$1,389.00
CA$1,389.00
Shelyak 10 µm Mirror Slit for Shelyak Spectrographs
CA$183.00 - CA$183.00
CA$183.00
CA$183.00 - CA$183.00
CA$183.00

Shelyak 10 µm Mirror Slit for Shelyak Spectrographs

10 µm Slit Width High-Reflectivity Mirror Finish Compatible with the Shelyak Alpy 600 Compatible with Shelyak UVEX Spectrographs Compatible with S...

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CA$183.00 - CA$183.00
CA$183.00
CA$183.00 - CA$183.00
CA$183.00
Shelyak Argon-Neon Calibration Lamps
CA$54.00 - CA$54.00
CA$54.00
CA$54.00 - CA$54.00
CA$54.00

Shelyak Argon-Neon Calibration Lamps

Pack of 3 replacement lamps Argon-Neon (ArNe) gas mixture OEM part for Shelyak spectrographs Compatible with Alpy, LISA, and UVEX Description F...

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CA$54.00 - CA$54.00
CA$54.00
CA$54.00 - CA$54.00
CA$54.00
Shelyak Spox Module for Alpy/LISA with 0.8m cable
CA$695.00 - CA$695.00
CA$695.00
CA$695.00 - CA$695.00
CA$695.00

Shelyak Spox Module for Alpy/LISA with 0.8m cable

Automates calibration lamp control for Alpy 600, LISA, and LHIRES III spectrographs Includes 0.8m cable for connecting the module to the spectrogr...

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CA$695.00 - CA$695.00
CA$695.00
CA$695.00 - CA$695.00
CA$695.00
Shelyak 0.63x SCT F/6.3 Focal Reducer
CA$348.00 - CA$348.00
CA$348.00
CA$348.00 - CA$348.00
CA$348.00

Shelyak 0.63x SCT F/6.3 Focal Reducer

0.63x Focal Reduction Factor Transforms f/10 Systems to f/6.3 Apochromatic Triplet Optical Design Standard 2-inch (50.8 mm) SCT Thread Optimized f...

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CA$348.00 - CA$348.00
CA$348.00
CA$348.00 - CA$348.00
CA$348.00
Shelyak Optical kit for SUNSCAN spectroheliograph by STAROS Projects
CA$748.00 - CA$748.00
CA$748.00
CA$748.00 - CA$748.00
CA$748.00

Shelyak Optical kit for SUNSCAN spectroheliograph by STAROS Projects

Build the STAROS Projects SUNSCAN spectroheliograph Includes a 2400 lines/mm holographic grating Features a 2-position slit with 7 µm and 10 µm op...

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CA$748.00 - CA$748.00
CA$748.00
CA$748.00 - CA$748.00
CA$748.00
Shelyak Optical kit for Sol’Ex spectroheliograph
CA$593.00 - CA$593.00
CA$593.00
CA$593.00 - CA$593.00
CA$593.00

Shelyak Optical kit for Sol’Ex spectroheliograph

Build a high-resolution solar spectroheliograph Achieves 0.03 nm resolution at 650 nm with 10 µm slit Tunable across the 400 nm to 700 nm visible ...

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CA$593.00 - CA$593.00
CA$593.00
CA$593.00 - CA$593.00
CA$593.00
Shelyak Spare Lamp for Flats
CA$19.00 - CA$19.00
CA$19.00
CA$19.00 - CA$19.00
CA$19.00

Shelyak Spare Lamp for Flats

Halogen incandescent bulb, BA9s socket 12V, 6W (500mA) spare bulb for flat images Ensures Consistent, Repeatable Illumination Description FAQ ...

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CA$19.00 - CA$19.00
CA$19.00
CA$19.00 - CA$19.00
CA$19.00
CA$48.00 - CA$48.00
CA$48.00
CA$48.00 - CA$48.00
CA$48.00

Shelyak Spacer for Star Analyser

Increases Grating-to-Sensor Distance Adjusts Spectrum Dispersion for Optimal Scale Stackable Design for Custom Spacing Matches Spectrum Length to ...

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CA$48.00 - CA$48.00
CA$48.00
CA$48.00 - CA$48.00
CA$48.00
Shelyak Grating module for the UVEX - 150 l/mm
CA$1,071.00 - CA$1,071.00
CA$1,071.00
CA$1,071.00 - CA$1,071.00
CA$1,071.00

Shelyak Grating module for the UVEX - 150 l/mm

150 lines/mm Grating Density Designed for the Shelyak UVEX Spectroscope Optimized for Low-Resolution, Wide-Coverage Spectroscopy Interchangeable M...

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CA$1,071.00 - CA$1,071.00
CA$1,071.00
CA$1,071.00 - CA$1,071.00
CA$1,071.00
Shelyak Grating module for the UVEX - 1200 l/mm
CA$1,071.00 - CA$1,071.00
CA$1,071.00
CA$1,071.00 - CA$1,071.00
CA$1,071.00

Shelyak Grating module for the UVEX - 1200 l/mm

1200 lines/mm Grating Density Designed for the Shelyak UVEX Spectroscope Enables High-Resolution Spectroscopy User-Interchangeable Module Doubles ...

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CA$1,071.00 - CA$1,071.00
CA$1,071.00
CA$1,071.00 - CA$1,071.00
CA$1,071.00
Shelyak Adapter set for Lhires III (camera backfocus 34mm)
CA$184.00 - CA$184.00
CA$184.00
CA$184.00 - CA$184.00
CA$184.00

Shelyak Adapter set for Lhires III (camera backfocus 34mm)

Connects CCD/CMOS cameras to a Shelyak Lhires III spectroscope Engineered for a nominal camera backfocus of 34mm Accommodates a backfocus range fr...

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CA$184.00 - CA$184.00
CA$184.00
CA$184.00 - CA$184.00
CA$184.00
Shelyak 530 nm UVEX order filter kit
CA$278.00 - CA$278.00
CA$278.00
CA$278.00 - CA$278.00
CA$278.00

Shelyak 530 nm UVEX order filter kit

Designed for the Shelyak Instruments UVEX Spectrograph Suppresses 2nd Order Near-Infrared (IR) Spectral Contamination Ensures Cleaner, More Accura...

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CA$278.00 - CA$278.00
CA$278.00
CA$278.00 - CA$278.00
CA$278.00
Shelyak Alpy 200 Optical Core Module
CA$504.00 - CA$504.00
CA$504.00
CA$504.00 - CA$504.00
CA$504.00

Shelyak Alpy 200 Optical Core Module

Converts an Alpy 600 into an Alpy 200 Spectrograph Resolving Power of R~130 with a 23µm slit Fast F/4 Aperture for high light throughput Optimized...

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CA$504.00 - CA$504.00
CA$504.00
CA$504.00 - CA$504.00
CA$504.00
Shelyak Sol’Ex / SUNSCAN 2-position slit 7 – 10 µm (GEN2)
CA$109.00 - CA$109.00
CA$109.00
CA$109.00 - CA$109.00
CA$109.00

Shelyak Sol’Ex / SUNSCAN 2-position slit 7 – 10 µm (GEN2)

Dual Slit Widths: 7µm and 10µm Substrate Dimensions: 12 x 8 x 2 mm Material: Heat-Resistant Eagle XG Glass Wavelength Range: 350 nm to 1000 nm Coa...

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CA$109.00 - CA$109.00
CA$109.00
CA$109.00 - CA$109.00
CA$109.00
Shelyak High Performance 23µm Slit
CA$514.00 - CA$514.00
CA$514.00
CA$514.00 - CA$514.00
CA$514.00

Shelyak High Performance 23µm Slit

23µm Slit Width Over 90% Reflectivity Protected Aluminum Coating 350-800nm Anti-Reflection Coating Compatible with ALPY 600 & UVEX Spectroscop...

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CA$514.00 - CA$514.00
CA$514.00
CA$514.00 - CA$514.00
CA$514.00
Shelyak LISA Near-Infrared Conversion Kit
CA$1,297.00 - CA$1,297.00
CA$1,297.00
CA$1,297.00 - CA$1,297.00
CA$1,297.00

Shelyak LISA Near-Infrared Conversion Kit

Extends Spectral Range to 650-1000nm Optimized for Near-Infrared (NIR) Spectroscopy Replaces Camera Ring to Correct NIR Chromatism Adds an Order F...

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CA$1,297.00 - CA$1,297.00
CA$1,297.00
CA$1,297.00 - CA$1,297.00
CA$1,297.00
Shelyak Eyepiece Holder for Guiding
CA$511.00 - CA$511.00
CA$511.00
CA$511.00 - CA$511.00
CA$511.00

Shelyak Eyepiece Holder for Guiding

Enables direct visual guiding for spectrographs Accepts standard 1.25" eyepieces Replaces the need for a dedicated guide camera and software Desig...

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CA$511.00 - CA$511.00
CA$511.00
CA$511.00 - CA$511.00
CA$511.00
Shelyak Cable for hollow cathode lamp
CA$85.00 - CA$85.00
CA$85.00
CA$85.00 - CA$85.00
CA$85.00

Shelyak Cable for hollow cathode lamp

Designed for High-Voltage Power Supplies Connects Hollow Cathode Lamps Ensures Secure Electrical Connection Essential for Spectroscopic Calibratio...

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CA$85.00 - CA$85.00
CA$85.00
CA$85.00 - CA$85.00
CA$85.00
Shelyak Alpy & UVEX 35 µm slit
CA$314.00 - CA$314.00
CA$314.00
CA$314.00 - CA$314.00
CA$314.00

Shelyak Alpy & UVEX 35 µm slit

35 µm Precision Slit Width Integrated Guiding Mirror Surface Compatible with Shelyak Alpy & UVEX Spectrographs Description FAQ Specificatio...

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CA$314.00 - CA$314.00
CA$314.00
CA$314.00 - CA$314.00
CA$314.00

A Path into Spectroscopy

  • Star Analyser: A diffraction grating that threads into a camera or filter wheel like a filter. The simplest first step, showing stellar types and bright emission lines.
  • Low resolution (Alpy 200 and 600, LISA): Slit spectrographs that cover the whole visible spectrum. Ideal for classifying stars, novae, supernovae and comets.
  • Medium and high resolution (UVEX, Lhires III): Interchangeable gratings for detailed line profiles and radial velocity work.
  • Echelle (eShel): Fibre-fed high-resolution system covering a wide spectral range at once, used by advanced amateurs and observatories.
  • Solar spectroheliographs (Sol'Ex, SUNSCAN): Scan the Sun line by line to build images in H-alpha, calcium and other lines.

Explore the Collection

What We Plan With You

  • Resolution for your science: We match resolving power to what you want to measure, not the most expensive option.
  • Telescope focal ratio: Spectrographs are designed for a focal ratio range. We check your telescope and suggest a reducer or Barlow if needed.
  • Cameras and guiding: We confirm the imaging camera, guide camera and adapters needed for slit guiding.

Spectroscopy: Frequently Asked Questions

What telescope do I need for spectroscopy?

A Star Analyser works on almost any telescope or even a camera lens. Slit spectrographs work best on 8-inch and larger telescopes at f/5 to f/10, on a mount that tracks and guides well.

Can I contribute to science?

Yes. Databases such as ARAS and BeSS collect amateur spectra, and professionals request observations of novae, supernovae and variable stars.

Which camera should I use?

A mono camera with low read noise. Cooling helps for long exposures on faint targets.

Curious about spectroscopy?

Tell us your telescope and what you would like to measure. We will suggest the right first instrument.