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Sales & Clearance

Astronomy sales at David Astro, current markdowns across the catalogue, including open-box units, discontinued models still fully supported, and overstock we would rather see on a telescope than on a shelf. Everything here is held in Canadian stock and carries the same warranty and support as full-price inventory.

Reduced price does not mean reduced service. We will still calculate your back-focus, confirm compatibility and support the item after the sale, exactly as we would for anything else in the catalogue.

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Original price CA$21.00
Original price CA$21.00 - Original price CA$21.00
Original price CA$21.00
Current price CA$20.00
CA$20.00 - CA$20.00
Current price CA$20.00

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...

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Original price CA$21.00
Original price CA$21.00 - Original price CA$21.00
Original price CA$21.00
Current price CA$20.00
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Current price CA$20.00
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Original price CA$41.00
Original price CA$41.00 - Original price CA$41.00
Original price CA$41.00
Current price CA$36.00
CA$36.00 - CA$36.00
Current price CA$36.00

ZWO Sensor Tilt Plate - M42

Corrects sensor tilt for flat fields and sharp stars edge-to-edge Adds only 5mm of thickness to the optical path Suitable for APS-C cameras like t...

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Original price CA$41.00
Original price CA$41.00 - Original price CA$41.00
Original price CA$41.00
Current price CA$36.00
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Current price CA$36.00
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Original price CA$41.00
Original price CA$41.00 - Original price CA$41.00
Original price CA$41.00
Current price CA$36.00
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Current price CA$36.00

ZWO Sensor Tilt Plate - M48

Corrects Sensor Tilt: Ensures sharp stars across the entire image field by squaring the camera sensor to the optical axis. 5 mm Optical Path Lengt...

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Original price CA$41.00
Original price CA$41.00 - Original price CA$41.00
Original price CA$41.00
Current price CA$36.00
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Current price CA$36.00
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Original price CA$41.00
Original price CA$41.00 - Original price CA$41.00
Original price CA$41.00
Current price CA$36.00
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Current price CA$36.00

ZWO Sensor Tilt Plate - M54

Corrects sensor tilt for ZWO ASI6200, 2600, and 2400 cameras Connects compatible cameras and the M68 OAG to a 2" EFW Adds a minimal 5mm of optical...

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Original price CA$41.00
Original price CA$41.00 - Original price CA$41.00
Original price CA$41.00
Current price CA$36.00
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Current price CA$36.00
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Original price CA$27.00
Original price CA$27.00 - Original price CA$27.00
Original price CA$27.00
Current price CA$24.00
CA$24.00 - CA$24.00
Current price CA$24.00

ZWO Soft Bag for Cooled Cameras

Official ZWO Soft Bag for ZWO Cooled Cameras Constructed from Padded Heavy-Duty Fabric Lightweight Alternative to Hard Cases Description FAQ Sp...

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Original price CA$27.00
Original price CA$27.00 - Original price CA$27.00
Original price CA$27.00
Current price CA$24.00
CA$24.00 - CA$24.00
Current price CA$24.00
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Original price CA$49.00
Original price CA$49.00 - Original price CA$49.00
Original price CA$49.00
Current price CA$45.00
CA$45.00 - CA$45.00
Current price CA$45.00

ZWO Sony E Adapter for ASI Cameras

Connects Sony NEX (E-mount) lenses to ZWO ASI cameras Standard M42x0.75 female thread for direct camera attachment Enables wide-field astrophotogr...

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Original price CA$49.00
Original price CA$49.00 - Original price CA$49.00
Original price CA$49.00
Current price CA$45.00
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Original price CA$25.00
Original price CA$25.00 - Original price CA$25.00
Original price CA$25.00
Current price CA$22.00
CA$22.00 - CA$22.00
Current price CA$22.00

ZWO T-Mount Adapter - 1.25"

Connects T-threaded cameras to 1.25" focusers Standard M42x0.75 male T-threads Internally threaded for 1.25" astronomy filters Dur...

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Original price CA$25.00
Original price CA$25.00 - Original price CA$25.00
Original price CA$25.00
Current price CA$22.00
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Original price CA$25.00
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Current price CA$22.00
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Current price CA$22.00

ZWO T2 Female to Female Adapter - 11mm

Adds exactly 11 mm of spacing to your imaging train Female M42x0.75 T2 threads on both sides Connects two male T-threaded components Black anodize...

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Original price CA$25.00
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Original price CA$25.00
Current price CA$22.00
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Original price CA$17.00
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Original price CA$17.00
Current price CA$15.00
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Current price CA$15.00

ZWO T2 Male to T2 Male Adapter

Connects two female M42 T-threaded components Adds a fixed 2mm of optical path length Male-to-male M42x0.75 thread on both sides Durable black ano...

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Original price CA$17.00
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Original price CA$17.00
Current price CA$15.00
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Original price CA$67.00
Original price CA$67.00 - Original price CA$67.00
Original price CA$67.00
Current price CA$60.00
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Current price CA$60.00

ZWO T2 Tilter II

Corrects sensor tilt for sharp stars edge-to-edge Eliminates Newton's rings in H-alpha solar imaging Adds only 11 mm of back focus to the imaging ...

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Original price CA$67.00
Original price CA$67.00 - Original price CA$67.00
Original price CA$67.00
Current price CA$60.00
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Current price CA$60.00
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Original price CA$17.00
Original price CA$17.00 - Original price CA$17.00
Original price CA$17.00
Current price CA$15.00
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Current price CA$15.00

ZWO T2 To C/CS Adapter

Connects C-mount and CS-mount lenses to T2-threaded cameras Adds a precise 7mm to the optical path length Standard M42x0.75 male threads for unive...

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Original price CA$17.00
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Original price CA$17.00
Current price CA$15.00
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Current price CA$15.00
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Original price CA$83.00
Original price CA$83.00 - Original price CA$83.00
Original price CA$83.00
Current price CA$74.00
CA$74.00 - CA$74.00
Current price CA$74.00

ZWO T2 to Canon EOS EF-Mount Lens Adapter

Connects Canon EF lenses to any ZWO camera with M42 T2-threads Two-part design supports cameras with 12.5mm or 17.5mm back focus Includes a 5mm T2...

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Original price CA$83.00
Original price CA$83.00 - Original price CA$83.00
Original price CA$83.00
Current price CA$74.00
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Current price CA$74.00
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Original price CA$49.00
Original price CA$49.00 - Original price CA$49.00
Original price CA$49.00
Current price CA$45.00
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Current price CA$45.00

ZWO T2 to Micro 4/3 Lens Adapter

Adapts M42x0.75 (T2) Threads to Micro 4/3 (M43) Lens Mount Enables Use of Photographic Lenses on ZWO Astronomy Cameras All-Metal, Black Anodized C...

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Original price CA$49.00
Original price CA$49.00 - Original price CA$49.00
Original price CA$49.00
Current price CA$45.00
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Current price CA$45.00
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Original price CA$22.00
Original price CA$22.00 - Original price CA$22.00
Original price CA$22.00
Current price CA$20.00
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Current price CA$20.00

ZWO T2-1.25" Filter Adapter

Connects M42 (T2) threaded cameras to 1.25" filters Low-profile ring only 3 mm thick Maintains critical back focus for correctors and reducers Sec...

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Original price CA$22.00
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Original price CA$22.00
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Original price CA$35.00
Original price CA$35.00 - Original price CA$35.00
Original price CA$35.00
Current price CA$32.00
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Current price CA$32.00

ZWO T2-1.25" Holder

Connects T2 (M42x0.75) Male Threads to 1.25" Barrels Non-Marring Brass Compression Ring Secure Two-Thumbscrew Locking Durable, Low-Profile Aluminu...

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Original price CA$35.00
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Original price CA$35.00
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Original price CA$419.00
Original price CA$419.00 - Original price CA$419.00
Original price CA$419.00
Current price CA$379.00
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Current price CA$379.00

ZWO TC40 Carbon Fiber Tripod

Supports an exceptional 110.23 lb. payload Weighs only 5.07 lb. for extreme portability Carbon fiber legs with 1.5" max diameter for rigidity Adju...

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Original price CA$419.00
Original price CA$419.00 - Original price CA$419.00
Original price CA$419.00
Current price CA$379.00
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Current price CA$379.00
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Original price CA$40.00 - Original price CA$69.00
Original price CA$40.00
CA$36.00 - CA$62.00
CA$36.00 - CA$62.00
Current price CA$36.00

ZWO UV/IR CUT Filter

Threads into standard 1.25" filter holders and nosepieces Blocks unwanted ultraviolet (UV) and infrared (IR) wavelengths Functions as a primary Lu...

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Original price CA$40.00 - Original price CA$69.00
Original price CA$40.00
CA$36.00 - CA$62.00
CA$36.00 - CA$62.00
Current price CA$36.00
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What Goes on Sale and Why

Understanding why an item is discounted helps you judge whether it is the right purchase, so we are explicit about the reason wherever we can be.

  • Open-box and display units: Returned or demonstrated equipment that has been inspected and tested here, typically indistinguishable from new in use.
  • Superseded models: Products replaced by a newer revision, often with only minor changes and full parts and warranty support remaining.
  • Overstock: Items we hold more of than current demand justifies, discounted while the stock lasts.
  • Seasonal accessories: Dew control, cases and cold-weather items that move seasonally and are reduced outside their peak.
  • End-of-line accessories: Adapters, rings and small parts from lines being retired, which remain perfectly serviceable.
  • Used equipment: Our separate collection of tested second-hand gear, for buyers comfortable with pre-owned optics and mounts.

Why Choose David Astro for Discounted Astronomy Gear

A discount is only a good deal if the item is right for your setup and stays supported afterwards.

  • Compatibility checked before you commit: We will confirm a sale item actually fits your telescope or mount, because a bargain adapter that does not fit is not a bargain.
  • Condition stated honestly: Open-box and display items are described as what they are, with any cosmetic marks noted.
  • Full warranty on new items: Discounted new stock carries the same manufacturer warranty as anything else we sell, handled domestically.
  • Same support after the sale: Setup help, spacing calculations and in-house diagnostics apply to discounted purchases too.

Astronomy Sales in Canada: Frequently Asked Questions

Do sale items carry a warranty?

New discounted items carry the full manufacturer warranty. Open-box items are covered as stated on the listing, and we handle any claim domestically rather than routing it internationally.

Is an open-box item risky?

Not in our experience. Everything is inspected and functionally tested here before it is relisted, and anything with a cosmetic mark is described. Optics are checked for coating condition and collimation.

Can I still get support on a discontinued model?

Generally yes. We stock spare parts and adapters for many superseded models, and we say on the listing where parts availability is limited.

How long do sale prices last?

Until the stock is gone. These are finite quantities rather than a recurring promotion, so an item that disappears from this collection has usually sold rather than returned to full price.

Found something here?

Ask us before you order and we will confirm it fits your setup. Canadian stock, full support.