ZWO - ASI533MC Pro USB 3.0 Cooled Color Camera

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The ZWO ASI533MC Pro camera is a cooled color camera that comes with an impressive full well of 50,000e and a large sensor with 9.05MP. The size of the sensor gives this camera a 14bit dynamic range and provides astrophotographers with crisp clear images.

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Product Description

ZWO ASI533MC Pro USB 3.0 Cooled Color Camera

1" square sensor

The IMX533 is a 1-inch, 9MP CMOS image sensor in a square format with a 3.76 um pixel size, capable of producing frames at 20 frames/sec in 14bit mode.

Read out noise is as low as 1.0e which makes it comparable to SCMOS or EMCCD sensors and highly suitable for high definition, low noise imaging.

IMX533 backlit sensor

Sony’s back-illuminated CMOS image sensor improves sensitivity and noise reduction – the key factors to enhancing image quality, while radically realigning their fundamental pixel structure from front-illumination to back-illumination. It has retained the advantages of CMOS image sensors such as low power consumption and high-speed operation.

With a conventional front-illumination structure, the metal wiring and transistors on the surface of the silicon substrate that form the sensor’s light-sensitive area (photo-diode) impede photon gathering carried out by the on-chip lens. A back-illuminated structure minimizes the degradation of sensitivity to optical angle response, while also increasing the amount of light that enters each pixel due to the lack of obstacles such as metal wiring and transistors that have been moved to the reverse of the silicon substrate.
Sony has newly developed a unique photo-diode structure and on-chip lens optimized for back-illuminated structures, that achieves a higher sensitivity and a lower random noise without light by reducing noise, dark current and defect pixels compared to the conventional front-illuminated structure.

Camera Performance

Low read-out noise, high dynamic range.

QE Curve

We suppose the QE peak value is more than 80%.

Zero Amp Glow

Traditional CMOS sensors produce a weak infrared light source during operation quite often seen in the corner of uncalibrated images as the tell tale signs of ‘amp glow’. As the ASI533MC PRO uses zero amp glow circuitry, you won’t have to worry about amp glow even when using high gain, long exposure imaging.


Name ZWO - ASI533MC Pro USB 3.0 Cooled Color Camera
Manufacturer ZWO
UPC 0607467928276
Model ZWO-ASI533MC-P
Cooling -35° thermal delta


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Low noise and easy to use and integrate into existing software. The square image area does take some getting used to. (Posted on 2/17/2020)
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