ZWO ASI174MM The ASI174MM is an uncooled monochrome astronomy camera built around the Sony IMX174LLJ. Its 11.3 × 7.1 mm sensor records 1936 × 1216 pixels with 5.86 µm sampling.
Manufacturer model: ZWO ASI174MM · Specifications checked against manufacturer data on 2026-11-03
The ASI174MM is an uncooled monochrome astronomy camera built around the Sony IMX174LLJ. Its 11.3 × 7.1 mm sensor records 1936 × 1216 pixels with 5.86 µm sampling.
The manufacturer specifies a 12-bit ADC, 32,000-electron full well, 77% peak quantum efficiency and read noise of As low as 3.5 electrons. Capture speed is 128.2 fps at 12-bit; 164.5 fps at 10-bit. Smaller regions of interest can increase frame rate; speed depends on ADC mode, output format, exposure and connection. The global shutter exposes the frame simultaneously, reducing rolling-shutter distortion during motion.
Monochrome capture supports luminance and filtered imaging. Use suitable external filters to select the wavelength range for lunar, planetary or specialist imaging.
The USB connection supplies power and transfers images. The camera uses a M42 × 0.75 interface, with 6.5 mm bare; 17.5 mm with 11 mm ring sensor spacing. Its AR-coated window protects the sensor. The body is 62 mm in diameter and weighs 140 g. Match optical adapters and any external filter to the required telescope spacing.
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.
| ADC modes | 12-bit normal; 10-bit high speed |
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Data sheet
ZWO ASI174MM The ASI174MM is an uncooled monochrome astronomy camera built around the Sony IMX174LLJ. Its 11.3 × 7.1 mm sensor records 1936 × 1216 pixels with 5.86 µm sampling.
Manufacturer model: ZWO ASI174MM · Specifications checked against manufacturer data on 2026-11-03
