Skip to content
Price match 30-day returns* Talk to an astronomer before you buy

Spare Parts

Equipment rarely fails all at once. A thumbscrew strips, a tension spring loses its set, a plastic gear cracks in the cold, a knob goes missing in the grass — and a working telescope becomes a project. David Astro carries spare parts in Canada and can source many more through dealer channels, in stock and shipped from our Canadian warehouse.

Most manufacturers do not list service parts publicly but will supply them to authorized dealers. Tell us the model and what broke and we will check availability.

Filters

CA$25.00 - CA$25.00
CA$25.00
CA$25.00 - CA$25.00
CA$25.00

Baader Adjustable Spanner Wrench w/ 2mm Pins

Adjustable pin spacing for slotted retaining rings Precision-machined 2mm pins for secure engagement Prevents scratches and damage to optics and h...

View full details
CA$25.00 - CA$25.00
CA$25.00
CA$25.00 - CA$25.00
CA$25.00
CA$19.00 - CA$19.00
CA$19.00
CA$19.00 - CA$19.00
CA$19.00

Baader Rubber Eyeshield for Diam 33.5-34mm

Fits Eyepieces with 33.5mm to 34mm Diameter Blocks Stray Light to Improve Contrast Improves Viewing Comfort and Eye Placement Made from Flexible, ...

View full details
CA$19.00 - CA$19.00
CA$19.00
CA$19.00 - CA$19.00
CA$19.00
CA$24.00 - CA$24.00
CA$24.00
CA$24.00 - CA$24.00
CA$24.00

Baader Rubber/Metal Foldable Morpheus Eyecup M43

Foldable rubber eyecup Designed for observers with or without eyeglasses Durable metal base with M43 threads Blocks stray light to improve contras...

View full details
CA$24.00 - CA$24.00
CA$24.00
CA$24.00 - CA$24.00
CA$24.00
Kowa TSN-CV-88A Twist-Up Eyecup with Protection Glass for TE-11WZ II and TE-80XW
Kowa TSN-CV-88A Twist-Up Eyecup with Protection Glass for TE-11WZ II and TE-80XW
CA$139.00 - CA$139.00
CA$139.00
CA$139.00 - CA$139.00
CA$139.00

Kowa TSN-CV-88A Twist-Up Eyecup with Protection Glass for TE-11WZ II and TE-80XW

Direct replacement for Kowa TE-11WZ II and TE-80XW eyepieces Features integrated protection glass Protects the eyepiece lens from scratches and de...

View full details
CA$139.00 - CA$139.00
CA$139.00
CA$139.00 - CA$139.00
CA$139.00
Kowa Twist-Up Eyecup for TSN-600, 660M and 82SV Eyepieces
CA$49.00 - CA$49.00
CA$49.00
CA$49.00 - CA$49.00
CA$49.00

Kowa Twist-Up Eyecup for TSN-600, 660M and 82SV Eyepieces

Official Kowa replacement twist-up eyecup Eye-relief cap, as Kowa calls it Compatible with eyepieces for TSN-600, 660M, and 82SV series scopes Fit...

View full details
CA$49.00 - CA$49.00
CA$49.00
CA$49.00 - CA$49.00
CA$49.00
Orion Optics UK 150mm f4 Research 1/8 pv mirror
CA$498.00 - CA$601.00
CA$498.00
CA$578.00 - CA$681.00
CA$578.00 - CA$681.00
CA$578.00

Orion Optics UK 150mm F/4 Mirror

150mm aperture, f/4 Research grade, 1/8 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descriptio...

View full details
CA$498.00 - CA$601.00
CA$498.00
CA$578.00 - CA$681.00
CA$578.00 - CA$681.00
CA$578.00
Orion Optics UK 150mmf5 Standard 1/4pv mirror
CA$291.00 - CA$601.00
CA$291.00
CA$371.00 - CA$681.00
CA$371.00 - CA$681.00
CA$371.00

Orion Optics UK 150mm F/5 Mirror

150mm aperture, f/5 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descriptio...

View full details
CA$291.00 - CA$601.00
CA$291.00
CA$371.00 - CA$681.00
CA$371.00 - CA$681.00
CA$371.00
Orion Optics UK 150mmf8 Standard 1/4pv mirror
CA$307.00 - CA$597.00
CA$307.00
CA$387.00 - CA$677.00
CA$387.00 - CA$677.00
CA$387.00

Orion Optics UK 150mm F/8 Mirror

150mm aperture, f/8 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descriptio...

View full details
CA$307.00 - CA$597.00
CA$307.00
CA$387.00 - CA$677.00
CA$387.00 - CA$677.00
CA$387.00
Orion Optics UK 200mm f4.5 Standard 1/4pv mirror
CA$601.00 - CA$1,036.00
CA$601.00
CA$681.00 - CA$1,116.00
CA$681.00 - CA$1,116.00
CA$681.00

Orion Optics UK 200mm F/4.5 Mirror

200mm aperture, f/4.5 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descript...

View full details
CA$601.00 - CA$1,036.00
CA$601.00
CA$681.00 - CA$1,116.00
CA$681.00 - CA$1,116.00
CA$681.00
Orion Optics UK 200mm f6 Standard 1/4pv mirror
CA$589.00 - CA$981.00
CA$589.00
CA$669.00 - CA$1,061.00
CA$669.00 - CA$1,061.00
CA$669.00

Orion Optics UK 200mm F/6 Mirror

200mm aperture, f/6 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descriptio...

View full details
CA$589.00 - CA$981.00
CA$589.00
CA$669.00 - CA$1,061.00
CA$669.00 - CA$1,061.00
CA$669.00
Orion Optics UK 250mm f4.8 Standard 1/4pv mirror
CA$778.00 - CA$1,542.00
CA$778.00
CA$858.00 - CA$1,622.00
CA$858.00 - CA$1,622.00
CA$858.00

Orion Optics UK 250mm F/4.8 Mirror

250mm aperture, f/4.8 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descript...

View full details
CA$778.00 - CA$1,542.00
CA$778.00
CA$858.00 - CA$1,622.00
CA$858.00 - CA$1,622.00
CA$858.00
Orion Optics UK 250mm f6.3 Standard 1/4pv mirror
CA$840.00 - CA$1,604.00
CA$840.00
CA$920.00 - CA$1,684.00
CA$920.00 - CA$1,684.00
CA$920.00

Orion Optics UK 250mm F/6.3 Mirror

250mm aperture, f/6.3 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descript...

View full details
CA$840.00 - CA$1,604.00
CA$840.00
CA$920.00 - CA$1,684.00
CA$920.00 - CA$1,684.00
CA$920.00
Orion Optics UK 300mm f4 Standard 1/4pv mirror
CA$1,215.00 - CA$2,447.00
CA$1,215.00
CA$1,295.00 - CA$2,527.00
CA$1,295.00 - CA$2,527.00
CA$1,295.00

Orion Optics UK 300mm F/4 Mirror

300mm aperture, f/4 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descriptio...

View full details
CA$1,215.00 - CA$2,447.00
CA$1,215.00
CA$1,295.00 - CA$2,527.00
CA$1,295.00 - CA$2,527.00
CA$1,295.00
Orion Optics UK 300mm f5.3 Standard 1/4pv mirror
CA$1,123.00 - CA$2,234.00
CA$1,123.00
CA$1,203.00 - CA$2,314.00
CA$1,203.00 - CA$2,314.00
CA$1,203.00

Orion Optics UK 300mm F/5.3 Mirror

300mm aperture, f/5.3 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descript...

View full details
CA$1,123.00 - CA$2,234.00
CA$1,123.00
CA$1,203.00 - CA$2,314.00
CA$1,203.00 - CA$2,314.00
CA$1,203.00
Orion Optics UK 350mm f4.7 Standard 1/4pv mirror
CA$2,194.00 - CA$3,274.00
CA$2,194.00
CA$2,274.00 - CA$3,354.00
CA$2,274.00 - CA$3,354.00
CA$2,274.00

Orion Optics UK 350mm F/4.7 Mirror

350mm aperture, f/4.7 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descript...

View full details
CA$2,194.00 - CA$3,274.00
CA$2,194.00
CA$2,274.00 - CA$3,354.00
CA$2,274.00 - CA$3,354.00
CA$2,274.00
Orion Optics UK 35x49x10mm Plate elliptical flat mirror
CA$129.00 - CA$2,156.00
CA$129.00 - CA$2,156.00
CA$129.00 - CA$2,156.00
CA$129.00

Orion Optics UK 35x49x10mm Plate elliptical flat mirror

35x49mm minor/major axis 10mm thick Plate substrate Precision ground and coated in the UK Description Specifications In the Box Warranty ...

View full details
CA$129.00 - CA$2,156.00
CA$129.00 - CA$2,156.00
CA$129.00 - CA$2,156.00
CA$129.00
Orion Optics UK 400mm f4 Standard 1/4pv mirror
CA$3,415.00 - CA$5,467.00
CA$3,415.00 - CA$5,467.00
CA$3,415.00 - CA$5,467.00
CA$3,415.00

Orion Optics UK 400mm F/4 Mirror

400mm aperture, f/4 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descriptio...

View full details
CA$3,415.00 - CA$5,467.00
CA$3,415.00 - CA$5,467.00
CA$3,415.00 - CA$5,467.00
CA$3,415.00
Orion Optics UK 500mm f4 Standard 1/4pv mirror
CA$4,668.00 - CA$7,692.00
CA$4,668.00 - CA$7,692.00
CA$4,668.00 - CA$7,692.00
CA$4,668.00

Orion Optics UK 500mm F/4 Mirror

500mm aperture, f/4 Standard grade, 1/4 PV wavefront accuracy Hand-figured in the UK Supplied with a Zygo interferometer test report Descriptio...

View full details
CA$4,668.00 - CA$7,692.00
CA$4,668.00 - CA$7,692.00
CA$4,668.00 - CA$7,692.00
CA$4,668.00
QHYCCD Level Convertor Board Kit (for Scientific Cameras)
CA$84.00 - CA$84.00
CA$84.00
CA$84.00 - CA$84.00
CA$84.00

QHYCCD Level Convertor Board Kit (for Scientific Cameras)

Interfaces with camera's high-speed 6-pin GPIO port Provides safe, buffered access to FPGA signals User-configurable VCC supports logic levels fro...

View full details
CA$84.00 - CA$84.00
CA$84.00
CA$84.00 - CA$84.00
CA$84.00
QHYCCD Liquid Cooling Kit for Astronomy Cameras
CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00

QHYCCD Liquid Cooling Kit for Astronomy Cameras

Dedicated Liquid Cooling: Engineered for compatible LQ-series astronomy cameras. Physical Footprint: Measures 29cm x 13cm x 17cm. Substantial B...

View full details
CA$420.00 - CA$420.00
CA$420.00
CA$420.00 - CA$420.00
CA$420.00
Tele Vue Eyeguard Extender - Twist-on Style 1
CA$63.00 - CA$63.00
CA$63.00
CA$63.00 - CA$63.00
CA$63.00

Tele Vue Eyeguard Extender - Twist-on Style

Compatibility: All Tele Vue eyepieces that accept Dioptrx Adjustment: Twist-up variable height extension Function: Increases eyeguard height for n...

View full details
CA$63.00 - CA$63.00
CA$63.00
CA$63.00 - CA$63.00
CA$63.00
CA$25.00 - CA$25.00
CA$25.00
CA$25.00 - CA$25.00
CA$25.00

ZWO Replacement Antenna for ASIAIR Plus

Genuine ZWO Replacement Part Direct Fit for ASIAIR Plus Restores Original Wi-Fi Link Replaces Lost or Damaged Antennas Description FAQ Specific...

View full details
CA$25.00 - CA$25.00
CA$25.00
CA$25.00 - CA$25.00
CA$25.00
CA$21.00 - CA$21.00
CA$21.00
CA$21.00 - CA$21.00
CA$21.00

ZWO Replacement Fan for ASI Cameras

Official ZWO OEM replacement fan Restores original cooling performance to Cooled/Pro cameras Backed by a 2-year manufacturer warranty Descripti...

View full details
CA$21.00 - CA$21.00
CA$21.00
CA$21.00 - CA$21.00
CA$21.00

The Parts That Fail First

Failures cluster around a small number of components, most of them inexpensive and most of them disabling.

  • Thumbscrews and set screws: Stripped, lost or seized fasteners on focusers, rings and saddles — the single most common small failure.
  • Tension springs and clutches: Focuser tension springs and mount clutch components that lose grip over time and cause slipping.
  • Gears and worm components: Drive parts, particularly plastic gears in lower-cost mounts, which become brittle after repeated cold cycling.
  • Hand controllers and cables: Coiled cables that fail internally after flexing, and connectors that corrode at the mount end.
  • Knobs and locking levers: Altitude and azimuth adjusters, focus knobs and locking levers that shear or strip.
  • Felt, liners and seals: Ring liners and light-baffle felt that compress or peel over time and are easy to replace.

Why Choose David Astro for Spare Parts

Being an authorized dealer matters most in the categories nobody thinks about at the point of purchase.

  • Dealer channel access: We can request service parts that are not publicly listed, which is often the only route to a specific fastener or gear.
  • Identification from a photo: Send us a picture and the model and we will identify the part rather than requiring a part number you do not have.
  • In-house repair as an alternative: If the part is unavailable, we can often repair or fabricate a solution rather than declaring the equipment finished.
  • Genuine components: Manufacturer parts with warranty where applicable, stocked in Canada and shipped worldwide.
  • Ships from Canada: Small parts delivered quickly and without duties or brokerage fees for Canadian buyers.

Spare Parts in Canada — Frequently Asked Questions

Can you get parts for a discontinued telescope?
Often yes. Many manufacturers maintain service stock well beyond a product's sales life and supply it to dealers. Tell us the model and the part and we will check.
I do not know the part number. Can you still help?
Yes. Send us a photograph and the equipment model and we will identify it. Part numbers for fasteners and small components are rarely documented for customers anyway.
Why do plastic parts fail in winter?
Polymers become brittle at low temperatures, and a gear or knob that flexes fine at room temperature can crack at minus 25 under normal force. Metal replacements exist for some common failures.
What if the part is not available?
We can often repair the assembly in-house or fabricate a functional replacement, which is usually faster and cheaper than replacing the whole component.

Something broken?

Send us a photo and the model and we will find the part or repair it. Canadian stock and in-house service.