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Shelyak

Spectroscopy is the branch of amateur astronomy where a modest telescope still contributes real science. A spectrum reveals what a star is made of, how fast it is moving, and whether something has changed — measurements that are as valuable from a backyard as from a mountaintop. Shelyak Instruments builds the spectrographs that make this accessible. David Astro carries Shelyak products in Canada, in stock, with fast shipping across Canada and worldwide.

Resolution, target brightness and telescope aperture determine which instrument suits you. Tell us what you want to measure and we will match it.

Filtres

Shelyak 0.63x SCT F/6.3 Focal Reducer
CA$322.00 - CA$322.00
CA$322.00
CA$322.00 - CA$322.00
CA$322.00

Shelyak 0.63x SCT F/6.3 Focal Reducer

SHK-EL0110

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$322.00 - CA$322.00
CA$322.00
CA$322.00 - CA$322.00
CA$322.00
Shelyak 10 µm Mirror Slit for Shelyak Spectrographs
CA$177.00 - CA$177.00
CA$177.00
CA$177.00 - CA$177.00
CA$177.00

Shelyak 10 µm Mirror Slit for Shelyak Spectrographs

SHK-SE0253

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

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CA$177.00 - CA$177.00
CA$177.00
CA$177.00 - CA$177.00
CA$177.00
Shelyak 12V/7A power supply + 4-way cable
CA$470.00 - CA$470.00
CA$470.00
CA$470.00 - CA$470.00
CA$470.00

Shelyak 12V/7A power supply + 4-way cable

SHK-SE0133

Powers multiple devices from a single 12V/7A source Reduces cable clutter around the telescope Includes a 4-way cable with mixed connector sizes T...

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CA$470.00 - CA$470.00
CA$470.00
CA$470.00 - CA$470.00
CA$470.00
Shelyak 50µm Object Fiber - 10m
CA$479.00 - CA$479.00
CA$479.00
CA$479.00 - CA$479.00
CA$479.00

Shelyak 50µm Object Fiber - 10m

SHK-PF0050

10m Fiber Length 50µm Core Diameter High-OH Fiber for UV-VIS Transmission (380-800nm) FC-type Connectors (Both Ends) <0.5dB Signal Attenuation ...

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CA$479.00 - CA$479.00
CA$479.00
CA$479.00 - CA$479.00
CA$479.00
Shelyak 50µm Object Fiber - 20m
CA$705.00 - CA$705.00
CA$705.00
CA$705.00 - CA$705.00
CA$705.00

Shelyak 50µm Object Fiber - 20m

SHK-PF0051

50µm Core Diameter 20 Meter Length Less than 0.5dB Attenuation 380-800nm Spectral Range FC-Type Connectors (Both Ends) Description FAQ Specific...

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CA$705.00 - CA$705.00
CA$705.00
CA$705.00 - CA$705.00
CA$705.00
Shelyak 50µm Object Fiber - 5m
CA$313.00 - CA$313.00
CA$313.00
CA$313.00 - CA$313.00
CA$313.00

Shelyak 50µm Object Fiber - 5m

SHK-PF0049

50µm Core Diameter Object Fiber 5m Cable Length FC Type Connectors (Both Ends) 380nm - 800nm+ Wavelength Range Numerical Aperture: 0.22 Less than ...

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CA$313.00 - CA$313.00
CA$313.00
CA$313.00 - CA$313.00
CA$313.00
Shelyak 530 nm UVEX order filter kit
CA$258.00 - CA$258.00
CA$258.00
CA$258.00 - CA$258.00
CA$258.00

Shelyak 530 nm UVEX order filter kit

SHK-SE0248

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

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CA$258.00 - CA$258.00
CA$258.00
CA$258.00 - CA$258.00
CA$258.00
Shelyak Acquisition Camera Ring Set: 13mm Backfocus
CA$162.00 - CA$162.00
CA$162.00
CA$162.00 - CA$162.00
CA$162.00

Shelyak Acquisition Camera Ring Set: 13mm Backfocus

SHK-SE0110

13mm Nominal Backfocus Accommodates Cameras with 9.15mm to 13.15mm Backfocus Compatible with Shelyak Lhires III Spectroscopes Compatible with Shel...

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CA$162.00 - CA$162.00
CA$162.00
CA$162.00 - CA$162.00
CA$162.00
Shelyak Adapter cord for the SPOX module
CA$131.00 - CA$131.00
CA$131.00
CA$131.00 - CA$131.00
CA$131.00

Shelyak Adapter cord for the SPOX module

SHK-SE0183

Official Shelyak accessory cable Connects the SPOX remote control module Enables control of calibration lamps Compatible with Alpy 600, LISA, and ...

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CA$131.00 - CA$131.00
CA$131.00
CA$131.00 - CA$131.00
CA$131.00
Shelyak Adapter Ring for Canon EOS to T-Mount (M42x0.75)
CA$313.00 - CA$313.00
CA$313.00
CA$313.00 - CA$313.00
CA$313.00

Shelyak Adapter Ring for Canon EOS to T-Mount (M42x0.75)

SHK-BA0023

Adapts Canon EOS (EF/EF-S) camera bodies to the standard T-mount Provides female M42x0.75 T-threads for secure connections Enables prime-focus ast...

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CA$313.00 - CA$313.00
CA$313.00
CA$313.00 - CA$313.00
CA$313.00
Shelyak Adapter set for Lhires III (camera backfocus 34mm)
CA$171.00 - CA$171.00
CA$171.00
CA$171.00 - CA$171.00
CA$171.00

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

SHK-SE0082

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$171.00 - CA$171.00
CA$171.00
CA$171.00 - CA$171.00
CA$171.00
Shelyak Adapter set for Lhires III (camera with 25mm backfocus)
CA$171.00 - CA$171.00
CA$171.00
CA$171.00 - CA$171.00
CA$171.00

Shelyak Adapter set for Lhires III (camera with 25mm backfocus)

SHK-SE0080

Compatibility: Shelyak Lhires III Spectroscope Required Camera Backfocus: 23.35mm to 27.35mm Ensures Precise Sensor-to-Optics Spacing Critical for...

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CA$171.00 - CA$171.00
CA$171.00
CA$171.00 - CA$171.00
CA$171.00
Shelyak Adapter set for Lhires III (camera with backfocus 17 mm)
CA$171.00 - CA$171.00
CA$171.00
CA$171.00 - CA$171.00
CA$171.00

Shelyak Adapter set for Lhires III (camera with backfocus 17 mm)

SHK-SE0014

Connects cameras with 17 mm backfocus to a Lhires III spectrograph Ensures precise sensor-to-spectrograph spacing Critical for achieving optimal s...

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CA$171.00 - CA$171.00
CA$171.00
CA$171.00 - CA$171.00
CA$171.00
Shelyak Alpy & UVEX 35 µm slit
CA$305.00 - CA$305.00
CA$305.00
CA$305.00 - CA$305.00
CA$305.00

Shelyak Alpy & UVEX 35 µm slit

SHK-SE0150

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

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CA$305.00 - CA$305.00
CA$305.00
CA$305.00 - CA$305.00
CA$305.00
Shelyak Alpy 200 Optical Core Module
CA$466.00 - CA$466.00
CA$466.00
CA$466.00 - CA$466.00
CA$466.00

Shelyak Alpy 200 Optical Core Module

SHK-SE0275

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$466.00 - CA$466.00
CA$466.00
CA$466.00 - CA$466.00
CA$466.00
Shelyak Alpy 200 Spectroscope
CA$1,349.00 - CA$1,349.00
CA$1,349.00
CA$1,349.00 - CA$1,349.00
CA$1,349.00

Shelyak Alpy 200 Spectroscope

SHK-PF0083

Resolving power of R~130 optimized for faint targets Fast F/4 optical design Multi-position wheel with 25µm, 50µm, 100µm, and 300µm slits Compact ...

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CA$1,349.00 - CA$1,349.00
CA$1,349.00
CA$1,349.00 - CA$1,349.00
CA$1,349.00
Shelyak Alpy 200 Switch Module
CA$940.00 - CA$940.00
CA$940.00
CA$940.00 - CA$940.00
CA$940.00

Shelyak Alpy 200 Switch Module

SHK-SE0276

Converts an Alpy 600 system for low-resolution spectroscopy Resolving Power: R ~130 with a 23µm slit Optimized for F/4 telescope systems Tool-free...

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CA$940.00 - CA$940.00
CA$940.00
CA$940.00 - CA$940.00
CA$940.00
CA$1,349.00 - CA$1,349.00
CA$1,349.00
CA$1,349.00 - CA$1,349.00
CA$1,349.00

Spectroscope Shelyak Alpy 600

SHK-PF0035

Les logiciels Alpy 600 et Demetra (développés par Shelyak Instrument pour le spectrographe ALPY 600) vous permettront de produire des spectres sci...

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CA$1,349.00 - CA$1,349.00
CA$1,349.00
CA$1,349.00 - CA$1,349.00
CA$1,349.00
Shelyak Alpy Barlow Lens for Alpy 600 Spectroscope
CA$205.00 - CA$205.00
CA$205.00
CA$205.00 - CA$205.00
CA$205.00

Shelyak Alpy Barlow Lens for Alpy 600 Spectroscope

SHK-SE0128

Enables DSLR camera use with Alpy 600 spectroscope Increases available backfocus for long imaging trains Accommodates cameras with integrated filt...

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CA$205.00 - CA$205.00
CA$205.00
CA$205.00 - CA$205.00
CA$205.00
CA$1,279.00 - CA$1,279.00
CA$1,279.00
CA$1,279.00 - CA$1,279.00
CA$1,279.00

Module d'étalonnage Shelyak Alpy

SHK-PF0037

L'étalonnage en longueur d'onde d'un spectre nécessite d'observer le spectre d'une lumière d'étalonnage, c'est-à-dire d'une lumière à nombreuses r...

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CA$1,279.00 - CA$1,279.00
CA$1,279.00
CA$1,279.00 - CA$1,279.00
CA$1,279.00
Shelyak Alpy Guiding Mirror with 50 µm Slit
CA$305.00 - CA$305.00
CA$305.00
CA$305.00 - CA$305.00
CA$305.00

Shelyak Alpy Guiding Mirror with 50 µm Slit

SHK-SE0151

50 µm Slit Width Integrated Guiding Mirror Compatible with Alpy Spectrograph Systems Optimized for Faint Object Spectroscopy Description FAQ Sp...

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CA$305.00 - CA$305.00
CA$305.00
CA$305.00 - CA$305.00
CA$305.00
CA$1,557.00 - CA$1,557.00
CA$1,557.00
CA$1,557.00 - CA$1,557.00
CA$1,557.00

Module de guidage Shelyak Alpy

SHK-PF0036

Le spectroscope Alpy 600 peut être utilisé sur table ou en laboratoire : dans ce cas, il suffit de placer la source lumineuse à observer devant la ...

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CA$1,557.00 - CA$1,557.00
CA$1,557.00
CA$1,557.00 - CA$1,557.00
CA$1,557.00
Shelyak Argon-Neon Calibration Lamps
CA$52.00 - CA$52.00
CA$52.00
CA$52.00 - CA$52.00
CA$52.00

Shelyak Argon-Neon Calibration Lamps

SHK-SE0148

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

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CA$52.00 - CA$52.00
CA$52.00
CA$52.00 - CA$52.00
CA$52.00
Shelyak C-mount adapter for the Alpy 600
CA$106.00 - CA$106.00
CA$106.00
CA$106.00 - CA$106.00
CA$106.00

Shelyak C-mount adapter for the Alpy 600

SHK-SE0129

Connects C-mount cameras to the Shelyak Alpy 600 Provides an adjustable backfocus range from 9.5mm to 20mm Replaces the standard T-mount thread on...

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CA$106.00 - CA$106.00
CA$106.00
CA$106.00 - CA$106.00
CA$106.00

Amateur Spectroscopy Instruments

Spectrographs trade resolution against the faintness of the targets they can reach. Choosing well means knowing which side of that trade your programme sits on.

  • Low-resolution spectrographs: Capture a broad spectrum from relatively faint targets, suitable for classifying stars, observing novae and studying emission-line objects.
  • High-resolution spectrographs: Resolve fine line detail and small wavelength shifts for radial velocity and line profile work, requiring brighter targets and longer exposures.
  • Echelle designs: Capture a wide wavelength range at high resolution simultaneously by stacking spectral orders, at higher cost and complexity.
  • Calibration modules: Reference lamps that provide known wavelength lines, without which a spectrum cannot be accurately calibrated.
  • Guiding provision: Keeping a star on a narrow slit for minutes requires integrated guiding, and this is a core part of the instrument rather than an add-on.
  • Transmission gratings: Simple grating filters that thread into an eyepiece barrel, the least expensive way to record a first spectrum.

Why Choose David Astro for Shelyak

Spectroscopy has a steeper learning curve than imaging, and the equipment choice should reflect where you are starting.

  • Programme-based recommendation: We ask what you want to measure, because a radial velocity programme and a nova monitoring programme need very different resolutions.
  • Realistic aperture guidance: Spectroscopy spreads a star's light across a detector, so target brightness and aperture matter more than in imaging. We set expectations honestly.
  • Starting point suggested: For a first spectrum we will often suggest a transmission grating before a slit spectrograph, since it teaches the workflow at a fraction of the cost.
  • Authorized dealer: Full manufacturer warranty with support handled in Canada.
  • Ships from Canada: No duties or brokerage fees for Canadian buyers.

Shelyak in Canada — Frequently Asked Questions

What aperture do I need for spectroscopy?
More than for imaging the same object, because the light is spread across a spectrum. Low-resolution work on bright stars is achievable with modest apertures; high resolution needs both aperture and bright targets.
Can amateurs contribute real data?
Yes, substantially. Amateur spectra of novae, symbiotic stars and Be stars feed into professional monitoring programmes, because professionals cannot cover every object every night.
Where should I start?
A transmission grating that threads into an eyepiece barrel records a recognizable spectrum for very little money and teaches the calibration workflow, which is the hard part.
Do I need a calibration lamp?
For quantitative work, yes. Without reference lines of known wavelength you cannot calibrate the spectrum accurately, which limits it to qualitative comparison.

Interested in spectroscopy?

Tell us your telescope and what you want to measure and we will suggest a starting instrument. In stock and shipping from Canada.