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ZWO ASI432MM Monochrome Astronomy Camera
The ZWO ASI432MM Monochrome Camera features a 1.1" 1.7MP IMX432 sensor with 9.0µm pixels, USB 3.0, and AR-coated optics, ideal for high-speed planetary and solar imaging.
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The ZWO ASI432MM is a high-performance monochrome astronomy camera designed for solar, lunar, and planetary imaging. Equipped with the 1.1-inch Sony IMX432 sensor, the ASI432MM delivers exceptional clarity, high sensitivity, and excellent control over dynamic range—ideal for capturing detailed surface structures and solar activity.
Large Pixels for Enhanced Light Sensitivity
The ZWO-ASI432MM boasts a resolution of 1.7 megapixels (1608 x 1104 pixels) and a large pixel size of 9.0µm, offering outstanding light sensitivity and noise control. Its sensor's high dynamic range enhances image quality, particularly in high-contrast scenarios. The asi432 camera supports a fast frame rate, enabling smooth capture of dynamic events such as solar prominences and planetary transits.
With a peak QE of up to 79%, the asi432mm performs exceptionally well across both the visible and near-infrared spectrum. This makes it highly effective for narrowband solar imaging using filters like H-alpha or Ca-K, as well as for detailed monochrome captures of lunar terrain and planetary discs.
Low Read Noise
The ZWO ASI432MM is designed with low read noise, ensuring smooth, clean results even in high-speed imaging scenarios. Its rolling shutter supports fast frame rates, allowing you to freeze dynamic moments such as planetary transits, lunar surface motion, or solar flares.
With USB 3.0 connectivity, the ASI432MM ensures fast and stable data transfer for seamless imaging sessions. The camera is also equipped with a rolling shutter and low read noise for precise exposures. A protective AR-coated glass window reduces reflections and enhances light transmission.
Optimised for Solar and Planetary Imaging
With its large pixels, excellent sensitivity, high full well depth, and strong NIR response, the ZWO ASI432MM Monochrome Astronomy Camera is a great choice for those focused on solar imaging, lunar close-ups, and planetary detail.
Full Specifications
| Type | Monochrome |
| Sensor Type | IMX432 |
| Sensor Size | 14.5x9.95mm |
| Pixel Size | 9μm |
| Format | 1.1" |
| Read Noise | 2.9e - 21.2e |
| Resolution | 1.77 MP (1608x1104) |
| Max Framerate | 120 FPS |
| Zero Amp Glow? | Yes |
| Delta T | N/A |
| Memory Buffer | 256MB DDR3 |
| Shutter | Rolling Shutter |
| QE Peak | 79% |
| Full Well | 97,000e |
| Back Focus | 6.5mm/17.5mm |
| ADC | 12-bit |
| Exposure Range | 32us-2000s |
| Protecting window | AR coated window |
| USB | 3.0 |
| Adapter | M42 X 0.75 |
| Weight | 126 g |
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ZWO 850 IR 1.25-inch Filter Add a IR-Pass filter to enhances contrast in planetary imaging (great for Mars, Jupiter, Moon). |
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ZWO ASIAIR Plus - 256GB Model Control your new astronomy camera with the ZWO ASIAIR Plus. This device enables you to control, guide, filter control and power your camera without using a computer. Perfect for streamlining and cord management! |
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ZWO ADC Atmospheric Dispersion Corrector Add an ADC which helps correct colour fringing caused by atmospheric dispersion (especially for low-altitude planets). |
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ZWO 850 IR 1.25-inch Filter Add a IR-Pass filter to enhances contrast in planetary imaging (great for Mars, Jupiter, Moon). |
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ZWO ASIAIR Plus - 256GB Model Control your new astronomy camera with the ZWO ASIAIR Plus. This device enables you to control, guide, filter control and power your camera without using a computer. Perfect for streamlining and cord management! |
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ZWO ADC Atmospheric Dispersion Corrector Add an ADC which helps correct colour fringing caused by atmospheric dispersion (especially for low-altitude planets). |
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ZWO 7 Position 2-inch Electronic Filter Wheel Add 7 of your favourite filters into an electronic filter wheel to swap between them automatically. Suitable for 2" threaded filters. |
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Mechanical Drawing
About ZWO Optical: Astrophotography has never been easier
Established in 2011, ZWO Optical is a fast-growing global astroimaging camera powerhouse based in Suzhou China. They focus on building and innovating groundbreaking CMOS cameras such as the iconic ZWO ASI120MM Monochrome CMOS camera (the first-ever planetary CMOS camera to beat a CCD in the early 2010s). ZWO continues to pioneer new astrophotography technology with revolutionary features to capture exceptional quality of images of space that will last you a lifetime.
Today, ZWO cameras are recognised by every passionate astrophotographer and are available in over 25 countries internationally.
Product code: ASI432MM
| Colour / Monochrome | Monochrome |
|---|---|
| Sensor Type | IMX432 |
| Sensor Size | 14.5 x 9.95mm |
| Resolution | 1608 x 1104 |
| Pixel Size | 2.4e |
| ADC | 12 bit |
| FPS | 120 |
| Shutter | Rolling Shutter |
| QE Peak | 79% |
| Full Well | 97000e |
| Cooled? | No |
| Usage | Planetary Imaging |
| Images | Item | Qty |
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ZWO ASI432MM Monochrome Astronomy Camera Body | 1 |
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ST4 Cable | 1 |
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USB3.0 Cable (2m) | 1 |
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T2 Filter | 1 |
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1.25" Cover | 1 |
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2" Cover | 1 |
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1.25" Nosepiece | 1 |
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Quick Quide | 1 |
Q1. What types of astrophotography is the ZWO ASI432MM best suited for?
The ZWO ASI432MM Monochrome Astronomy Camera is ideal for solar, lunar, and planetary imaging. Its large 9.0μm pixels, low read noise, and 97ke⁻ full well capacity provide excellent performance for capturing high-contrast surface details and solar features.
Q2. What telescope types pair well with the ASI432MM?
The ASI432MM is well suited to long focal length telescopes, such as Schmidt-Cassegrains, Maksutov-Cassegrains, and solar telescopes with narrowband filters. Its large pixel size complements high-magnification imaging of small objects like planets and sunspots.
Q3. How should I calculate the backfocus for the ASI432MM in my imaging setup?
The asi432 has a 17.5mm backfocus from the sensor to the M42 thread. When using accessories like a filter wheel or off-axis guider, add their individual thicknesses to reach the standard 55mm optical backfocus, commonly required by reducers or flatteners.
For a typical setup: 17.5mm (camera), 20mm (filter wheel), 16.5mm (M42 extension or adapter) for a Total = 54–55mm.
Q4. How do I clean the sensor window of the ASI432MM?
To clean the AR-coated sensor window of the ZWO-ASI432MM, use a manual air blower to remove dust. If further cleaning is needed, gently wipe the glass with a sensor-safe swab and cleaning solution. Avoid using strong pressure or abrasive cloths.
Q5. How should I store the ASI432MM when not in use?
Store the 432mm camera in a dry, dust-free environment with a desiccant or silica gel to prevent moisture buildup. Keep the sensor cap attached and avoid temperature extremes or prolonged direct sunlight to maintain sensor integrity and electrical components.
Q6. Does the ASI432MM require external power?
The ASI432MM draws power directly via its USB 3.0 interface, so no separate power supply is needed. However, for extended sessions or high-speed frame capture, ensure your USB port provides stable 5V output to avoid connection drops.
Q7. How do I achieve the best focus with the ASI432MM for solar imaging?
Use a Bahtinov mask, live view focusing, or software-assisted focusing in programs like SharpCap or ASIStudio. Focus is especially critical for the asi432mm when using narrowband filters like H-alpha. Fine focusers or electronic focusers are strongly recommended.
Q8. Can I bin the pixels on the ASI432MM for higher frame rates or signal?
Yes, the ASI432MM supports hardware binning, which allows you to combine pixels (e.g., 2x2 binning) to increase sensitivity and reduce file size. This is helpful when imaging faint features or when frame rate is more important than resolution.
Q9. Does the ZWO ASI Cameras work with ASIAIR?
Yes, ASI cameras is fully supported by ASIAIR. You can control cooling (for cooled cameras), gain, offset, exposures, filters (if connected via EFW), and guiding through the ASIAIR mobile app. Be sure to keep ASIAIR firmware and the app itself updated for best compatibility.
Q10. What software can I use with the ZWO ASI432MM?
The asi432mm is compatible with ZWO ASIStudio, FireCapture, SharpCap, and NINA, and works with both ZWO native drivers and ASCOM-compatible software. It is supported on Windows, macOS, and Linux platforms.