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Adapters

Almost every imaging train problem in astrophotography — soft corners, elongated stars, a camera that will not come to focus — traces back to a few millimetres of the wrong adapter. David Astro carries adapters in Canada covering M42, M48, M54, M68, SCT and Nikon and Canon bayonet standards, along with barrel adapters in 1.25" and 2", all in stock and shipping from Canada.

Adapters are the one product category where buying blind is genuinely expensive. Our team calculates back-focus and thread compatibility for customers every day, so before you assemble a stack from guesswork, send us your components and we will specify the parts.

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CA$279.00 - CA$279.00
CA$279.00
CA$279.00 - CA$279.00
CA$279.00

Daystar Interference Eliminator - T mount

DAY-MG0408
1 in stock

Eliminates interference fringes (Newton's Rings) in monochromatic imaging Maintains image centering and focus by tilting around the sensor's cente...

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CA$279.00 - CA$279.00
CA$279.00
CA$279.00 - CA$279.00
CA$279.00
CA$559.00 - CA$559.00
CA$559.00
CA$559.00 - CA$559.00
CA$559.00

Daystar Nikon Lens to Quark Adapter

DAY-DSZTNA

Adapts Nikon-mount lenses to Daystar Quark Solar Filters Enables H-alpha solar viewing and imaging with telephoto lenses Allows lens's zoom featur...

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CA$559.00 - CA$559.00
CA$559.00
CA$559.00 - CA$559.00
CA$559.00
CA$179.00 - CA$179.00
CA$179.00
CA$179.00 - CA$179.00
CA$179.00

Daystar Q34XGF and Q34XRD2 Plate Set

DAY-QX34SET

Directly connects a TeleVue 4x Powermate to Daystar Quantum or ION filters Creates a shorter, more rigid optical train for solar imaging Replaces ...

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CA$179.00 - CA$179.00
CA$179.00
CA$179.00 - CA$179.00
CA$179.00
CA$111.00 - CA$111.00
CA$111.00
CA$111.00 - CA$111.00
CA$111.00

Daystar Quantum Extension Tube - 2" 80mm Long

DAY-GM2D2

Adds 80mm of physical length to a 2" focuser Provides 85mm of additional outward focus travel Standard 2" male and female barrels Features a non-m...

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CA$111.00 - CA$111.00
CA$111.00
CA$111.00 - CA$111.00
CA$111.00
CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00

Daystar Quantum Front Flat Plate - 1.375"x24TPI (F)

DAY-Q3GF1F

Features 1.375"x24TPI female threads Designed for Daystar Quantum series solar filters Allows for custom mounting to telescopes and accessories Pr...

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CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00

Daystar Quantum Front Flat T Plate

DAY-Q3GFTF

Description FAQ Specifications In the Box Downloads Warranty Daystar Quantum Front Flat T Plate The Daystar Quantum Front Flat T Plate is...

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CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00

Daystar Quantum Front Wedge Plate - T-Thread

DAY-Q3GWTF

Enables off-axis solar imaging with Daystar Quantum filters on SCTs Features a standard female T-thread (M42x0.75mm) connection Precision-wedged t...

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CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00

Daystar Quantum Rear Combo plate - SCT/T

DAY-Q3RFCTM

Adapts Daystar Quantum filters to common astronomy threads Provides female T-threads (M42x0.75) for cameras and imaging accessories Features male ...

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CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$111.00 - CA$111.00
CA$111.00
CA$111.00 - CA$111.00
CA$111.00

Daystar Quark 2"/1.25" Male Silver Snout Pack for Camera Quark or Scout

DAY-SZ12

Provides both 1.25" and 2" male snouts for universal focuser compatibility Designed specifically for Daystar Camera Quark and Scout models Securel...

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CA$111.00 - CA$111.00
CA$111.00
CA$111.00 - CA$111.00
CA$111.00
CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00

Daystar Quark to C adapter

DAY-SZ1C

Direct C-Mount Threading for Daystar Quark Adds 10mm of Optical Path Length Internal Knife-Edge Baffles for Maximum Contrast Lightweight 0.06 lb A...

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CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$97.00 - CA$97.00
CA$97.00
CA$97.00 - CA$97.00
CA$97.00

Daystar Quark to C and Quark to T adapter Bundle

DAY-SZ1CT
3 in stock

Includes both C-thread and T-thread adapters for Daystar Quark filters Provides a rigid, direct-thread connection to eliminate camera tilt and fle...

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CA$97.00 - CA$97.00
CA$97.00
CA$97.00 - CA$97.00
CA$97.00
CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00

Daystar Quark to T adapter

DAY-SZ1T

Connects T-thread cameras directly to a Daystar Quark Adds 10mm of spacing (flange-to-flange) Internal knife-edge baffles reduce reflections Rigid...

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CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$97.00 - CA$97.00
CA$97.00
CA$97.00 - CA$97.00
CA$97.00

Daystar Rear Red Side - From SCT Thread to 2" Female Drawtube

DAY-RF2D2

Adapts standard SCT male threads to a 2" female drawtube Enables the use of 2-inch diagonals, eyepieces, and accessories Durable, single-piece met...

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CA$97.00 - CA$97.00
CA$97.00
CA$97.00 - CA$97.00
CA$97.00
CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00

Daystar Rear Red Side - 1.25" Drawtube Snout

DAY-RF1D1

1.25" Barrel Diameter Direct Fit for Daystar Quark Solar Filters Red Anodized Finish Enables Use in Standard 1.25" Focusers and Diagonals Descr...

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CA$83.00 - CA$83.00
CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$97.00 - CA$97.00
CA$97.00
CA$97.00 - CA$97.00
CA$97.00

Daystar Red Side Plate for Mounting 4X Powermate

DAY-Q34X2D2

Adapts the TeleVue 4X Powermate to Daystar Quantum or ION filters Creates a shorter, more rigid optical train Features a male M48x0.75 thread and ...

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CA$97.00 - CA$97.00
CA$97.00
CA$97.00 - CA$97.00
CA$97.00
CA$55.00 - CA$55.00
CA$55.00
CA$55.00 - CA$55.00
CA$55.00

Daystar T-Adapter to Canon

DAY-RFTC

Connects Canon EF-mount cameras to standard T-threads Standardized Female T-Thread (M42x0.75) Enables Prime Focus Astrophotography Single-Piece, S...

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CA$55.00 - CA$55.00
CA$55.00
CA$55.00 - CA$55.00
CA$55.00
CA$55.00 - CA$55.00
CA$55.00
CA$55.00 - CA$55.00
CA$55.00

Daystar T-Adapter to Nikon

DAY-RFTN

Connects Nikon F-Mount DSLR Cameras Standard M42x0.75 Female T-Threads Enables Prime-Focus Astrophotography Secure Bayonet Connection Descripti...

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CA$55.00 - CA$55.00
CA$55.00
CA$55.00 - CA$55.00
CA$55.00
CA$139.99 - CA$139.99
CA$139.99
CA$139.99 - CA$139.99
CA$139.99

Explore Scientific 2" Adapter for FFFR507X-00

ES-510364

Adapts the 3" 0.7x Reducer (FFFR507X-00) to fit 2" focusers Enables use of premium optics on a wider range of telescopes Secure, precision-machine...

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CA$139.99 - CA$139.99
CA$139.99
CA$139.99 - CA$139.99
CA$139.99
CA$97.99 - CA$97.99
CA$97.99
CA$97.99 - CA$97.99
CA$97.99

Explore Scientific 2" T2 Camera Adapter

ES-510365

Connects DSLR cameras to any 2-inch telescope focuser Standard male T2-thread (M42x0.75) for camera-specific T-rings Enables direct prime-focus as...

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CA$97.99 - CA$97.99
CA$97.99
CA$97.99 - CA$97.99
CA$97.99
CA$139.99 - CA$139.99
CA$139.99
CA$139.99 - CA$139.99
CA$139.99

Explore Scientific Adapter for FFFR507X-00 to 2.5" Hex Focuser

ES-510366

Dedicated Compatibility: Connects the Explore Scientific 3" 0.7x Reducer/Corrector (FFFR507X-00) to any telescope using the 2.5" Hex Focuser. Im...

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CA$139.99 - CA$139.99
CA$139.99
CA$139.99 - CA$139.99
CA$139.99
CA$41.99 - CA$41.99
CA$41.99
CA$41.99 - CA$41.99
CA$41.99

Explore Scientific Camera-Ring M48x0.75 for Canon EOS

ES-510383
1 in stock

Connects Canon EOS cameras to M48x0.75 accessories Optimized for full-frame sensors to eliminate vignetting Wider clear aperture than standard M42...

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CA$41.99 - CA$41.99
CA$41.99
CA$41.99 - CA$41.99
CA$41.99
CA$41.99 - CA$41.99
CA$41.99
CA$41.99 - CA$41.99
CA$41.99

Explore Scientific Camera-Ring M48x0.75 for Nikon

ES-510384
1 in stock

Connects Nikon F-mount DSLR cameras to M48x0.75 threaded accessories 41.2mm clear inner diameter minimizes vignetting on full-frame sensors Adds a...

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CA$41.99 - CA$41.99
CA$41.99
CA$41.99 - CA$41.99
CA$41.99
CA$29.00 - CA$29.00
CA$29.00
CA$29.00 - CA$29.00
CA$29.00

Explore Scientific M42x0.75 Adapter for FFEDAPO

ES-M42-075

Connects cameras to the Explore Scientific FFEDAPO Field Flattener Provides standard male M42x0.75 T-threads Required for attaching DSLR/mirrorles...

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CA$29.00 - CA$29.00
CA$29.00
CA$29.00 - CA$29.00
CA$29.00
CA$51.79 - CA$51.79
CA$51.79
CA$51.79 - CA$51.79
CA$51.79

Explore Scientific M48x0.75 Adapter for FFFR

ES-M48-0750.7x

Connects M48 (2-inch filter thread) accessories to the Explore Scientific 3" 0.7x Reducer Replaces the standard M42 T-thread adapter included with...

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CA$51.79 - CA$51.79
CA$51.79
CA$51.79 - CA$51.79
CA$51.79

Understanding Thread Standards and Back-Focus

An adapter does two things at once: it changes the connection type, and it changes the distance between your corrector and your sensor. The second effect is the one that causes trouble, because most reducers and flatteners have a back-focus tolerance of about one millimetre.

  • M42 (T-thread, 0.75 mm pitch): The long-standing standard for camera adapters. Its clear aperture will vignette sensors larger than APS-C, so full-frame imaging trains should avoid it.
  • M48 (2" thread, 0.75 mm pitch): The practical choice for APS-C and full-frame sensors, with enough clear aperture to avoid mechanical vignetting.
  • M54 and M68: Larger-diameter threads used by heavier astrographs and larger-format correctors where rigidity and aperture both matter.
  • SCT 2"-24 TPI: The rear-cell thread on Schmidt-Cassegrains; requires a specific adapter to reach M42 or M48 for imaging.
  • Bayonet adapters: Canon EF and Nikon F adapters place a DSLR or mirrorless body at the correct flange distance, typically 44 mm and 46.5 mm respectively.
  • Fine-tuning spacers: 0.5 mm, 1 mm and 2 mm shims that let you land exactly on a corrector's specified spacing rather than near it.

Why Choose David Astro for Adapters

An adapter is a cheap part that determines whether an expensive telescope performs. We treat it that way.

  • Free back-focus calculation: Give us your camera, filter thickness, reducer and telescope and we will return a component list with the total spacing worked out.
  • Filter thickness accounted for: Glass in the light path shifts focus by roughly one third of its thickness, and we include that in the calculation rather than leaving you to discover it.
  • Male and female threads identified: We specify the gender and standard on both ends, which is the detail most listings omit.
  • Deep Canadian stock: Hundreds of adapters held domestically, so a missing 10 mm spacer does not cost you three weeks of clear sky.
  • Authorized dealer: Genuine manufacturer parts with full warranty, shipped from Canada without duties for Canadian buyers.

Adapters in Canada — Frequently Asked Questions

How do I calculate my back-focus?
Add your camera's sensor-to-flange distance, any filter wheel or off-axis guider, the filter's optical shift, and every spacer between the camera and the corrector. That total must match the corrector's specified figure, usually 55 mm for a standard reducer.
Should I use M42 or M48?
Use M48 for any sensor larger than APS-C. M42 has enough clear aperture for smaller sensors but will mechanically vignette a full-frame chip regardless of the optics ahead of it.
Do filters change my spacing?
Yes. A filter shifts the focal plane by about one third of its glass thickness. A 3 mm filter adds roughly 1 mm to the effective optical path, which is enough to matter at a 55 mm target.
What if I order the wrong adapter?
Contact us with your setup before ordering and we will confirm the parts. That is a faster path than exchanges, and it is a service we provide free.

Send us your imaging train

We will calculate the spacing and specify every adapter you need. Canadian stock, no guesswork.