ZWO ASI461MM Pro The ASI461MM Pro is a cooled monochrome astronomy camera using the Sony IMX461 sensor. Its 43.856 × 32.9 mm imaging area records 11656 × 8750 pixels with 3.76 µm pixels and a native 16-bit ADC.
Manufacturer model: ZWO ASI461MM Pro · Specifications checked against manufacturer data on 2026-11-03
The ASI461MM Pro is a cooled monochrome astronomy camera using the Sony IMX461 sensor. Its 43.856 × 32.9 mm imaging area records 11656 × 8750 pixels with 3.76 µm pixels and a native 16-bit ADC.
ZWO specifies 50,300 electrons full-well capacity, peak quantum efficiency of 91% and read noise of 1.0–3.3 (0.9 at 46 dB gain) electrons. The listed capture rate is 3.77 fps advertised maximum; actual transfer speed depends on image size, ADC/output mode and USB connection. Monochrome imaging allows separate luminance, colour and narrowband exposures using suitable external filters.
Two-stage TEC cooling reduces thermal signal during long exposures. The manufacturer cooling specification is Two-stage TEC; 30–35 °C below ambient, tested at 30 °C ambient. A 512 MB DDR3 buffer and USB 3.0 connection support reliable downloads.
The camera connection is M68 × 1, with sensor spacing of 17.5 mm bare; 22.5 mm with 5 mm tilt plate. The protective window is 79.3 × 4 mm AR-coated window. Use a 12 V DC, 3–5 A supply with a 5.5 × 2.1 mm centre-positive connector; the recommended battery range is 11–14 V. Include adapters and any filter wheel when calculating telescope backfocus.
ZWO manufacturer documentation
Use the exact named-model manufacturer connection and operating instructions linked with this product. Optional parts and adapters require their specified spacing and power limits.
| Bin2 pixel size (µm) | 7.5 |
|---|---|
| Bin2 full well (e⁻) | 198000 |
Data sheet
ZWO ASI461MM Pro The ASI461MM Pro is a cooled monochrome astronomy camera using the Sony IMX461 sensor. Its 43.856 × 32.9 mm imaging area records 11656 × 8750 pixels with 3.76 µm pixels and a native 16-bit ADC.
Manufacturer model: ZWO ASI461MM Pro · Specifications checked against manufacturer data on 2026-11-03
