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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$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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CA$2,119.00
CA$2,119.00 - CA$2,119.00
CA$2,119.00
CA$1,902.00
CA$1,902.00 - CA$1,902.00
CA$1,902.00

ZWO ASI2600MC Pro V2 Cooled Color Camera

26.1 Megapixel APS-C Sony IMX571 Sensor Two-Stage TEC Cooling, 30-35°C Below Ambient 16-Bit ADC with 73ke Full Well Capacity Readout Noise as low ...

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CA$2,119.00
CA$2,119.00 - CA$2,119.00
CA$2,119.00
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 ASI2600MC-AIR Wireless Smart Color

26 MP APS-C Color CMOS Sensor Integrated ASIAIR Computer with 256 GB Storage Built-in SC2210 Autoguiding Sensor Wireless Control via WiFi Interfac...

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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$3,239.00
CA$3,239.00 - CA$3,239.00
CA$3,239.00
CA$2,917.00
CA$2,917.00 - CA$2,917.00
CA$2,917.00

ZWO ASI2600MM Pro DUO Mono

Integrates a 26.1 MP IMX571 imaging sensor and a 1920x1080 SC2210 guide sensor APS-C format monochrome sensor with 3.76µm pixels Peak Quantum Effi...

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CA$3,239.00
CA$3,239.00 - CA$3,239.00
CA$3,239.00
CA$2,917.00
CA$2,917.00 - CA$2,917.00
CA$2,917.00
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CA$2,819.00
CA$2,819.00 - CA$2,819.00
CA$2,819.00
CA$2,537.00
CA$2,537.00 - CA$2,537.00
CA$2,537.00

ZWO ASI2600MM Pro V2 Cooled Mono Camera

26.1 Megapixel APS-C Sony IMX571 Mono Sensor 3.76µm Pixel Size 91% Peak Quantum Efficiency 1.0e - 3.3e Read Noise True 16-bit ADC & 73ke Full ...

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CA$2,819.00
CA$2,819.00 - CA$2,819.00
CA$2,819.00
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 ASI2600MM-AIR Wireless Smart Mono Camera

26 MP APS-C Monochrome CMOS Sensor (Sony IMX571) Integrated ASIAIR Control System with 2.4/5GHz WiFi Built-in SC2210 Guide Camera (1920 x 1080) 25...

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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$989.00
CA$989.00 - CA$989.00
CA$989.00
CA$887.00
CA$887.00 - CA$887.00
CA$887.00

ZWO ASI294MC Color

11.7 Megapixel 4/3" Sony IMX294 Color CMOS Sensor 4.63µm Pixels and 63,700e Full Well Capacity 19 FPS at Full 4144 x 2822 Resolution Ultra-Low 1.2...

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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$1,409.00
CA$1,409.00 - CA$1,409.00
CA$1,409.00
CA$1,268.00
CA$1,268.00 - CA$1,268.00
CA$1,268.00

ZWO ASI294MC Pro Color

11.7 Megapixel 4/3" Sony IMX294 Color CMOS Sensor 4.63µm Pixel Size Massive 63.7ke- Full Well Capacity Extremely Low 1.2e- Minimum Read Noise Two-...

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CA$1,409.00
CA$1,409.00 - CA$1,409.00
CA$1,409.00
CA$1,268.00
CA$1,268.00 - CA$1,268.00
CA$1,268.00
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CA$1,409.00
CA$1,409.00 - CA$1,409.00
CA$1,409.00
CA$1,268.00
CA$1,268.00 - CA$1,268.00
CA$1,268.00

ZWO ASI294MM Mono

11.7 Megapixel 4/3" Monochrome Sony IMX492 Sensor 4.63µm Pixels with 66ke- Full Well Capacity Peak Quantum Efficiency of ~90% Extremely Low Read N...

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CA$1,409.00
CA$1,409.00 - CA$1,409.00
CA$1,409.00
CA$1,268.00
CA$1,268.00 - CA$1,268.00
CA$1,268.00
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CA$1,809.00
CA$1,809.00 - CA$1,809.00
CA$1,809.00
CA$1,624.00
CA$1,624.00 - CA$1,624.00
CA$1,624.00

ZWO ASI294MM Pro Mono

4/3" Sony BSI CMOS Sensor 11.7 MP Resolution (4144 x 2822) at 4.63µm Pixel Size Unlockable 47 MP High-Resolution Mode at 2.3µm Pixel Size 90% Peak...

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CA$1,809.00
CA$1,809.00 - CA$1,809.00
CA$1,809.00
CA$1,624.00
CA$1,624.00 - CA$1,624.00
CA$1,624.00
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CA$849.00
CA$849.00 - CA$849.00
CA$849.00
CA$760.00
CA$760.00 - CA$760.00
CA$760.00

ZWO ASI432MM Mono

1.1" Sony IMX432 Monochrome Sensor Large 9µm Pixels Massive 97ke- Full Well Capacity 120 FPS at Full 1.7 MP Resolution Electronic Global Shutter ...

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CA$849.00
CA$849.00 - CA$849.00
CA$849.00
CA$760.00
CA$760.00 - CA$760.00
CA$760.00
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CA$4,229.00
CA$4,229.00 - CA$4,229.00
CA$4,229.00
CA$3,806.00
CA$3,806.00 - CA$3,806.00
CA$3,806.00

ZWO ASI4400MC Pro Cooled Color Full-Frame Camera

44.7 Megapixel Full-Frame (36mm x 24mm) Sony BSI CMOS Sensor 4.4µm Pixels with a 74.6k e- Full Well Capacity Two-Stage TEC Cooling to 30-35°C Belo...

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CA$4,229.00
CA$4,229.00 - CA$4,229.00
CA$4,229.00
CA$3,806.00
CA$3,806.00 - CA$3,806.00
CA$3,806.00
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CA$20,720.00
CA$20,720.00 - CA$20,720.00
CA$20,720.00
CA$18,781.00
CA$18,781.00 - CA$18,781.00
CA$18,781.00

ZWO ASI461MM Pro Mono

102 Megapixel Sony IMX461 Medium Format Monochrome Sensor 44mm x 33mm sensor size for vast, high-resolution fields of view 3.76µm pixels and 91% p...

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CA$20,720.00
CA$20,720.00 - CA$20,720.00
CA$20,720.00
CA$18,781.00
CA$18,781.00 - CA$18,781.00
CA$18,781.00
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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 ASI533MC Pro Color

9.05 Megapixel 1" Square Sony IMX533 Sensor 3.76µm Pixels & 50,000e- Full Well Depth Two-Stage TEC Cooling System Zero Amplifier Glow Circuitr...

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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$1,409.00
CA$1,409.00 - CA$1,409.00
CA$1,409.00
CA$1,268.00
CA$1,268.00 - CA$1,268.00
CA$1,268.00

ZWO ASI533MM Pro Mono

9.05 Megapixel 1-inch Square Monochrome Sensor Peak Quantum Efficiency of 91% 1.0e- Minimum Read Noise & Zero Amp Glow Two-Stage TEC Cooling 2...

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CA$1,409.00
CA$1,409.00 - CA$1,409.00
CA$1,409.00
CA$1,268.00
CA$1,268.00 - CA$1,268.00
CA$1,268.00
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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 ASI585MC Color

8.29 Megapixel 4K Resolution (3840 x 2160) 2.9µm Square Pixels 91% Peak Quantum Efficiency 46.9 FPS at Full Resolution Zero Amplifier Glow Circuit...

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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$849.00
CA$849.00 - CA$849.00
CA$849.00
CA$760.00
CA$760.00 - CA$760.00
CA$760.00

ZWO ASI585MC Pro Color

8.29 Megapixel 1/1.2" Sony IMX585 Color Sensor 2.9µm Pixel Size for High-Resolution Imaging 91% Peak Quantum Efficiency 47 FPS at Full 3840x2160 R...

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CA$849.00
CA$849.00 - CA$849.00
CA$849.00
CA$760.00
CA$760.00 - CA$760.00
CA$760.00
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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 ASI585MC-AIR Wireless Smart Color Camera

8.29 Megapixel 1/1.2" Sony IMX585 Color CMOS Sensor Integrated ASIAIR Plus, 256 GB Onboard Storage, and WiFi Control Built-in SC2210 Guide Sensor ...

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

ZWO ASI585MM Mono

8.29 Megapixel (3840 x 2160) Monochrome Sensor 2.9µm Pixel Size 91% Peak Quantum Efficiency 46.9 FPS at Full Resolution Description FAQ Specifi...

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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$1,399.00
CA$1,399.00 - CA$1,399.00
CA$1,399.00
CA$1,268.00
CA$1,268.00 - CA$1,268.00
CA$1,268.00

ZWO ASI585MM-AIR Wireless Smart Mono Camera

8.29 MP Sony IMX585 Monochrome Sensor Integrated SC2210 Guide Sensor Built-in ASIAIR Wireless Control System 91% Peak Quantum Efficiency Two-Stage...

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CA$1,399.00
CA$1,399.00 - CA$1,399.00
CA$1,399.00
CA$1,268.00
CA$1,268.00 - CA$1,268.00
CA$1,268.00
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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.