ZWO ASI220MM Mini
ZWO
ZWO ASI220MM Mini is a compact guide and planetary camera for keeping long-exposure rigs locked onto a star.
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Specifications
Sensor
- Sensor model
- SmartSens SC2210 mono CMOS
- Color / mono
- Monochrome
- Sensor size
- Type 1/1.8 (7.68 × 4.32 mm, 8.81 mm diagonal)
- Megapixels
- 2.07 MP
- Resolution
- 1920 × 1080 (2.07 MP)
- Sensor diagonal
- 8.81 mm
- Sensor area
- 33.2 mm²
- Pixel size
- 4 μm
- Shutter
- Rolling shutter
- ADC
- 12-bit
- Read noise
- 0.6-3.2 e- (1.97 e- @ 10.6 dB gain)
- Full well
- 8.78 ke-
- Peak QE
- 92% at 500 nm
Cooling
- Sensor window
- AR-coated protective window
Mechanical
- Back focus
- 8.5 mm
- Interface
- USB 2.0 Type-C + ST4 guide port
- Camera diameter
- 36 × 61 mm
- Weight
- 60 g
Sensor / electronics
- Pixel size
- 4 um
- Resolution
- 1920 x 1080
- Full well
- 8780 e-
- Interface
- USB 2.0
Astrophotography Fit
Best for off-axis guiding or guide scopes where a larger, more sensitive sensor improves star selection.
ZWO ASI220MM Mini is a small astronomy camera that can guide, and in many cases double as a lunar or planetary camera. Mono sensors are usually preferred for guiding sensitivity; color guide cameras make more sense when planetary use is also part of the plan.
For long focal length telescopes, sensor size matters because an off-axis guider sees a small, off-center slice of the field. For short refractors, a modest guide scope and a smaller guide camera are often enough.
Best paired with
- Off-axis guiders on SCTs, RCs, and longer refractors
- Mounts running PHD2, ASIAIR guiding, or similar software
- Rigid threaded guide paths with repeatable focus
Not recommended for
- Using as the primary camera for large deep-sky targets
- Loose finder-shoe guide scopes on long focal length rigs
- Expecting guiding to fix poor polar alignment, flexure, or mount overload
Where To Buy
Some links on this page are affiliate links. Prices and availability are pulled automatically from each retailer and updated daily.
| Retailer | Price | Availability | View Offer |
|---|---|---|---|
| Agena AstroProducts Agena AstroProducts | $269.00 | In stock Updated 9/20/2026 | View Offer - $269.00 |
| Astronomics Astronomics | $299.00 | In stock Updated 9/20/2026 | View Offer - $299.00 |
| Cloud Break Optics Cloud Break Optics | $299.00 | In stock Updated 9/20/2026 | View Offer - $299.00 |
| High Point Scientific High Point Scientific | $299.00 | In stock Updated 9/19/2026 | View Offer - $299.00 |
| Mile High Astronomy Mile High Astronomy | $299.00 | In stock Updated 9/20/2026 | View Offer - $299.00 |
| Starizona Starizona | $299.00 | In stock Updated 9/20/2026 | View Offer - $299.00 |
| Telescopes.net Telescopes.net | $299.00 | In stock Updated 9/20/2026 | View Offer - $299.00 |
| ZWO USA ZWO USA | $299.00 | In stock Updated 9/20/2026 | View Offer - $299.00 |
Price History
Chronological retailer pricing with out-of-stock points shown at reduced opacity.