ZWO ASI 432 MM Mono Astro Camera – uncooled astrophotography
The ZWO ASI 432 MM Mono Astro Camera is a monochrome camera with a large sensor and a smooth image for a wide range of astronomical 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 IMX432 / ASI 432 MM, it is designed for solar, lunar and planetary imaging, deep-sky imaging, infrared imaging and guiding. 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 IMX432 / ASI 432 MM |
|---|---|
| Camera type | Mono |
| Cooling | uncooled, passive heat dissipation |
| Typical applications | solar, lunar and planetary imaging, deep-sky imaging, infrared imaging and guiding |
| 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 432 MM is designed for high sensitivity when imaging the Sun, Moon and through long focal lengths. The large 1.1-inch sensor and 9 µm pixels collect plenty of light, while the global shutter renders moving details cleanly. The camera is also interesting for long-focal-length guiding and near-infrared imaging.
Sensor specifications
| Sensor | Sony IMX432 monochrome, Pregius global shutter |
|---|---|
| Sensor format | 1.1 inch; 14.47 × 9.94 mm |
| Resolution | 1608 × 1104 pixels / 1,77 MP |
| Pixel size | 9 µm |
| ADC / full well | 12 bit / approx. 97 ke⁻ |
| Quantum efficiency | approx. 79 % |
| Read noise | approx. 2.4 up to 20.8 e⁻ |
| Frame rate | up to 120 fps |
| Exposure time | 32 µs up to 2000 s |
| Connection | USB 3.0; global 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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