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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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CA$97.00
CA$97.00 - CA$97.00
CA$97.00
CA$87.00
CA$87.00 - CA$87.00
CA$87.00

ZWO 12V 10A AC to DC Power Adapter

Output: 12V DC, 10A Maximum Power: 120W Input: 100-240V AC Connector: 5.5mm x 2.1mm Center-Positive Description FAQ Specifications In the Box W...

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CA$97.00
CA$97.00 - CA$97.00
CA$97.00
CA$87.00
CA$87.00 - CA$87.00
CA$87.00
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CA$41.00
CA$41.00 - CA$41.00
CA$41.00
CA$36.00
CA$36.00 - CA$36.00
CA$36.00

ZWO 12V 5A AC to DC Power Adapter

Input Voltage: 100-240V AC Output: 12V DC at 5A Connector: 5.5mm x 2.1mm Center-Positive Compatibility: ASI Cooled Cameras, ASIAIR Pro, ASIAIR...

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CA$41.00
CA$41.00 - CA$41.00
CA$41.00
CA$36.00
CA$36.00 - CA$36.00
CA$36.00
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CA$139.00
CA$139.00 - CA$139.00
CA$139.00
CA$126.00
CA$126.00 - CA$126.00
CA$126.00

ZWO 160mm Pier Extension

Adds 160mm (6.30") of height for increased OTA clearance Designed for the ZWO AM5 mount Hollow, aircraft-grade aluminum construction for rigidity ...

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CA$139.00
CA$139.00 - CA$139.00
CA$139.00
CA$126.00
CA$126.00 - CA$126.00
CA$126.00
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CA$22.00
CA$22.00 - CA$22.00
CA$22.00
CA$20.00
CA$20.00 - CA$20.00
CA$20.00

ZWO 2" to 1.25" Filter Adapter Ring

Adapts 1.25" mounted filters for use in 2" filter holders Compatible with ZWO 5-position and 7-position 2" filter wheels Fits ZWO M42 and M54 filt...

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CA$22.00
CA$22.00 - CA$22.00
CA$22.00
CA$20.00
CA$20.00 - CA$20.00
CA$20.00
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CA$31.00
CA$31.00 - CA$31.00
CA$31.00
CA$28.00
CA$28.00 - CA$28.00
CA$28.00

ZWO 2.1mm 150° All-Sky Lens - For 1/3" Sensors

2.1mm Focal Length 150° Field of View Optimized for 1/3" Format Sensors Functions as an All-Sky Camera Lens Standard CS-Mount Thread Descriptio...

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CA$31.00
CA$31.00 - CA$31.00
CA$31.00
CA$28.00
CA$28.00 - CA$28.00
CA$28.00
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CA$31.00
CA$31.00 - CA$31.00
CA$31.00
CA$28.00
CA$28.00 - CA$28.00
CA$28.00

ZWO 2.5mm 170° All-Sky Lens - For 1/2" Sensors

2.5mm Focal Length 170° All-Sky Field of View Designed for 1/2" Format Sensors CS-Mount Thread Description FAQ Specifications I...

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CA$31.00
CA$31.00 - CA$31.00
CA$31.00
CA$28.00
CA$28.00 - CA$28.00
CA$28.00
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CA$279.00
CA$279.00 - CA$279.00
CA$279.00
CA$253.00
CA$253.00 - CA$253.00
CA$253.00

ZWO 200mm Pier Extension

Adds 200mm of height to prevent OTA collisions Engineered specifically for the ZWO AM5 Mount Hollow, aircraft-grade aluminum construction Compatib...

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CA$279.00
CA$279.00 - CA$279.00
CA$279.00
CA$253.00
CA$253.00 - CA$253.00
CA$253.00
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CA$209.00
CA$209.00 - CA$209.00
CA$209.00
CA$188.00
CA$188.00 - CA$188.00
CA$188.00

ZWO 30mm f/5 APO Guide Scope

30mm Aperture 150mm Focal Length (f/5.0) Triplet Apochromatic (APO) Lens Design Precise Helical Focuser Lightweight at 0.77 lb. Description FAQ...

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CA$209.00
CA$209.00 - CA$209.00
CA$209.00
CA$188.00
CA$188.00 - CA$188.00
CA$188.00
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CA$69.00
CA$69.00 - CA$69.00
CA$69.00
CA$62.00
CA$62.00 - CA$62.00
CA$62.00

ZWO 78mm Holder Ring

Securely mounts ZWO cooled cameras with a 78mm diameter body Locks with a single M6 screw on the side Mounting foot with two 1/4"-20 threaded hole...

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CA$69.00
CA$69.00 - CA$69.00
CA$69.00
CA$62.00
CA$62.00 - CA$62.00
CA$62.00
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CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$74.00
CA$74.00 - CA$74.00
CA$74.00

ZWO 90mm Holder Ring

Engineered for a precise 90 mm camera body diameter Official fit for ZWO ASI2600 and ASI6200 Pro Cooled Cameras Features two 1/4"-20 and six M4 th...

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CA$83.00
CA$83.00 - CA$83.00
CA$83.00
CA$74.00
CA$74.00 - CA$74.00
CA$74.00
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CA$17.00
CA$17.00 - CA$17.00
CA$17.00
CA$15.00
CA$15.00 - CA$15.00
CA$15.00

ZWO Adapter - 2mm M54(M)/M48(F)

Connects M54 Filter Wheels to M48 Accessories Adds Only 2 mm to Optical Path Maintains 55 mm Back Focus Standard Knurled Edge for Secure Grip Desi...

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CA$17.00
CA$17.00 - CA$17.00
CA$17.00
CA$15.00
CA$15.00 - CA$15.00
CA$15.00
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CA$2,099.00
CA$2,099.00 - CA$2,099.00
CA$2,099.00
CA$1,902.00
CA$1,902.00 - CA$1,902.00
CA$1,902.00

ZWO AM3N Harmonic Equatorial Mount with TC40 Tripod

17.64 lb. payload capacity without counterweights 9.04 lb. mount head Dual Alt-Azimuth and Equatorial modes 0-90° latitude range for operation any...

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CA$2,099.00
CA$2,099.00 - CA$2,099.00
CA$2,099.00
CA$1,902.00
CA$1,902.00 - CA$1,902.00
CA$1,902.00
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CA$2,799.00
CA$2,799.00 - CA$2,799.00
CA$2,799.00
CA$2,537.00
CA$2,537.00 - CA$2,537.00
CA$2,537.00

ZWO AM5N Harmonic Equatorial Mount with TC40 Tripod

Carries 33 lb. without counterweights 12.1 lb. lightweight mount head Dual Equatorial and Alt-Azimuth modes 0° to 90° latitude range for worldwide...

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CA$2,799.00
CA$2,799.00 - CA$2,799.00
CA$2,799.00
CA$2,537.00
CA$2,537.00 - CA$2,537.00
CA$2,537.00
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CA$3,499.00
CA$3,499.00 - CA$3,499.00
CA$3,499.00
CA$3,171.00
CA$3,171.00 - CA$3,171.00
CA$3,171.00

ZWO AM7 Harmonic Equatorial Mount with TC40 Tripod

44 lb. payload capacity without a counterweight 14.9 lb. mount head weight Dual Equatorial and Alt-Azimuth modes Stepper motor with 0.17" resoluti...

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CA$3,499.00
CA$3,499.00 - CA$3,499.00
CA$3,499.00
CA$3,171.00
CA$3,171.00 - CA$3,171.00
CA$3,171.00
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CA$27.00
CA$27.00 - CA$27.00
CA$27.00
CA$24.00
CA$24.00 - CA$24.00
CA$24.00

ZWO Anti-Dew Heater Strip

Maintains a clear sensor window on ZWO ASI cooled cameras Consumes a minimal 4.2 watts of power Ultra-thin 0.2 mm to 0.3 mm profile for a non-intr...

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CA$27.00
CA$27.00 - CA$27.00
CA$27.00
CA$24.00
CA$24.00 - CA$24.00
CA$24.00
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CA$26.00 - CA$69.00
CA$26.00
CA$24.00 - CA$62.00
CA$24.00 - CA$62.00
CA$24.00

ZWO AR Protective Window

Protects camera sensor from dust and humidity 21mm, 25mm and 60mm sizes for specific ZWO camera models High-transmission Anti-Reflection (AR) coat...

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CA$26.00 - CA$69.00
CA$26.00
CA$24.00 - CA$62.00
CA$24.00 - CA$62.00
CA$24.00
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CA$279.00
CA$279.00 - CA$279.00
CA$279.00
CA$253.00
CA$253.00 - CA$253.00
CA$253.00

ZWO ASI120MM Mini Mono Guide Camera

1.2 Megapixel monochrome CMOS sensor (1280 x 960) 3.75µm pixel size for precise guiding and planetary detail Peak Quantum Efficiency of 80% for hi...

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CA$279.00
CA$279.00 - CA$279.00
CA$279.00
CA$253.00
CA$253.00 - CA$253.00
CA$253.00
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CA$559.00
CA$559.00 - CA$559.00
CA$559.00
CA$506.00
CA$506.00 - CA$506.00
CA$506.00

ZWO ASI174MM Mini Mono Guide Camera

Large 1/1.2" Sony CMOS Sensor 2.4 MP Resolution (1936 x 1216) 5.86µm Pixel Size 77% Peak Quantum Efficiency Standard 1.25" Body with ST-4 and USB ...

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CA$559.00
CA$559.00 - CA$559.00
CA$559.00
CA$506.00
CA$506.00 - CA$506.00
CA$506.00
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CA$699.00
CA$699.00 - CA$699.00
CA$699.00
CA$633.00
CA$633.00 - CA$633.00
CA$633.00

ZWO ASI174MM Mono

IMX174 Sensor Pixel Size of 5.86 microns QE of 77% USB 3.0 ...

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CA$699.00
CA$699.00 - CA$699.00
CA$699.00
CA$633.00
CA$633.00 - CA$633.00
CA$633.00
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CA$709.00
CA$709.00 - CA$709.00
CA$709.00
CA$633.00
CA$633.00 - CA$633.00
CA$633.00

ZWO ASI183MC Color

20.2 Megapixel 1" Sony IMX183 BSI CMOS Sensor 2.4µm pixels for high-resolution planetary and solar system imaging 19 FPS at full 5496 x 3672 resol...

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CA$709.00
CA$709.00 - CA$709.00
CA$709.00
CA$633.00
CA$633.00 - CA$633.00
CA$633.00
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CA$1,129.00
CA$1,129.00 - CA$1,129.00
CA$1,129.00
CA$1,014.00
CA$1,014.00 - CA$1,014.00
CA$1,014.00

ZWO ASI183MC Pro Color

20.2 Megapixel 1" Sony IMX183 BSI CMOS Sensor 2.4µm pixels for high-resolution imaging with short focal length telescopes Two-stage TEC cooling re...

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CA$1,129.00
CA$1,129.00 - CA$1,129.00
CA$1,129.00
CA$1,014.00
CA$1,014.00 - CA$1,014.00
CA$1,014.00
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CA$989.00
CA$989.00 - CA$989.00
CA$989.00
CA$887.00
CA$887.00 - CA$887.00
CA$887.00

ZWO ASI183MM Mono

20.2 Megapixel (5496 x 3672) 1" Monochrome CMOS Sensor 2.4µm Pixel Size for High-Resolution Sampling 84% Peak Quantum Efficiency (BSI Sensor) 1.6e...

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CA$989.00
CA$989.00 - CA$989.00
CA$989.00
CA$887.00
CA$887.00 - CA$887.00
CA$887.00
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CA$419.00
CA$419.00 - CA$419.00
CA$419.00
CA$379.00
CA$379.00 - CA$379.00
CA$379.00

ZWO ASI220MM Mini Mono Guide Camera

2.1 Megapixel Resolution (1920 x 1080) 4.0µm Pixel Size 92% Peak Quantum Efficiency 0.6e Minimum Read Noise 1/1.8" Monochrome CMOS Sensor Descr...

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CA$419.00
CA$419.00 - CA$419.00
CA$419.00
CA$379.00
CA$379.00 - CA$379.00
CA$379.00
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CA$2,539.00
CA$2,539.00 - CA$2,539.00
CA$2,539.00
CA$2,283.00
CA$2,283.00 - CA$2,283.00
CA$2,283.00

ZWO ASI2600MC Pro DUO Color

26 MP APS-C Sony IMX571 Imaging Sensor Integrated 1920x1080 SC2210 Guide Sensor 16-Bit ADC & +73Ke Extended Full Well Capacity Zero Amplifier ...

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CA$2,539.00
CA$2,539.00 - CA$2,539.00
CA$2,539.00
CA$2,283.00
CA$2,283.00 - CA$2,283.00
CA$2,283.00
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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.