ZWO ASI 220 MM Mini Mono Astro Camera – uncooled astrophotography
The ZWO ASI 220 MM Mini Mono Astro Camera is a highly sensitive monochrome mini camera for lunar, planetary and autoguiding applications. It is a good choice whenever high frame rates, a steady image and straightforward operation are more important than active cooling.
What is this camera suited for?
With its Sony IMX662 / ASI 220 MM, it is designed for Moon, planets, infrared and autoguiding. The uncooled design keeps the camera compact and quick to set up. For long deep-sky exposures, a cooled camera is usually preferable; for the Moon, planets, guiding and many EAA applications, this model is especially practical.
Key features
| Series / sensor | Sony IMX662 / ASI 220 MM |
|---|---|
| Camera type | Mono |
| Cooling | uncooled, passive heat dissipation |
| Typical applications | Moon, planets, infrared and autoguiding |
| Connection | USB camera with autoguider/ST4 support depending on model |
The camera works with the relevant ZWO software and common capture applications. For solar imaging, use it only with a suitable solar filter mounted in front of the telescope.
CMOS sensor in detail
The ASI 220 MM Mini is primarily designed as a compact guiding camera, but its sensitive monochrome sensor also makes it suitable for lunar and planetary imaging. The larger 4 µm pixels and high near-infrared sensitivity are especially helpful when guide stars are faint.
Sensor specifications
| Sensor | Sony SC2210 monochrome |
|---|---|
| Sensor format | 1/1.8 inch; 7.68 × 4,32 mm |
| Resolution | 1920 × 1080 pixels / 2.07 MP |
| Pixel size | 4 µm |
| ADC / read noise | 12 bit / from 0.6 e⁻ |
| Quantum efficiency | up to approx. 92 % |
| Frame rate | up to 14 fps at full resolution |
| Exposure time | 32 µs up to 10 s |
| Connection | USB 2.0; ST4 guiding |
| Shutter | rolling shutter |
These figures help when choosing the right focal length and imaging method. Especially with small pixels, the actual level of detail depends on the combination of telescope, seeing and image scale. For solar imaging, always use a suitable solar filter mounted in front of the telescope.
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