ZWO ASI533MM Pro Mono Cooled

The ASI533MM PRO adopts a Sony back illuminated IMX533 sensor, which is a 1-inch square frame sensor made suitable for deep sky astrophotography needs. The ASI533MM Pro can be regarded as an upgrade of the ASI183 series. Not only does it retain the high-quality features of the ASI183, such as high QE and frame rate, it also features: no amp glow, readout noise as low as 1.0e, pixel size of 3.76 μm, and a 2-stage TEC cooling. It is highly recommended for beginners of deep sky astrophotography.    

1-inch Square Frame

The IMX533 is a 1-inch square frame CMOS image sensor with approximately 9M effective pixels at a pixel size of 3.76 μm. The 14-bit digital output of IMX533 makes it possible to read out signals of 9m effective pixels at a high speed of 20 frames per second with read noise as low as 1.0e, the performance of which is on par with those of SCMOS or EMCCD sensors. This sensor is suitable for image needs that require high definition and low noise.

The ASI533MM Pro is considered a full upgrade version of the ASI183 series.

Camera Curve

Low read noise, high dynamic range.  

Quantum Efficiency

Based on ZWO’s calculation, the peak quantum efficiency of ASI533MM Pro is greater than 91%.  

Zero Amp Glow

Traditional CMOS sensors can generate weak infrared light, which is equivalent to a light source during exposures. The ASI533MM Pro uses a no-glow circuitry to ensure best quality images regardless of gain or exposure length.

2 Stage TEC Cooling

The 2-stage thermoelectric can cool the CMOS sensor to 35 degrees below the ambient temperature (based on a 30 degree ambient temperature test results). Greatly reducing dark current and thereby improving the signal to noise ratio, even with a long expose of hundreds of seconds. 

Note: the lower the ambient temperature is, the smaller the Delta T is.

USB 3.0 & 256M DDR3 Memory

ASI533MM Pro is equipped with a USB 3.0 transmission interface. In 14-bit ADC mode, the output frame rate can reach 20 frames per second. Additionally, the 256M DDR3 memory ensures a more stable data transmission during long exposure without frame loss, and can also relax the hardware requirements of the computer used for data capture.

Technical Specifications

Sensor: Sony-IMX533CLK-D
Diagonal: 15.968mm
Resolution: 9 Mega Pixel 3008*3008
Pixel Size: 3.76μm
Max FPS at full resolution: 20fps
Shutter: Rolling shutter
Exposure Range: 32μs-2000s
ROI: Supported
Read Noise: 1.0-3.8e
QE peak: 91%
Full well: 50000e
ADC: 14bit
Interface: USB 3.0 Type-B
Adaptor: M42X0.75
Protect window: D32-2-AR
Dimensions: 78mm Diameter
Weight: 470g
Back Focus Distance: 17.5mm
Delta T: 30°C-35°C below ambient
Camera Power consumption: 650mA at 5V
Cooler Power consumption: 12V at 3A Max
Working Temperature: -5°C—50°C
Storage Temperature: -10°C—60°C
Working Relative Humidity: 0%—80%
Storage Relative Humidity: 20%—95%
Max FPS at full resolution:
14Bit ADC
3008×3008 19.88fps
1920×1080 54.11fps
1280×720 79.74fps
640×480 116.55ps
320×240 216.45fps

In the Box

• ASI533MM-P
• Camera Bag
• 1.25″ Nosepiece
• USB 2.0 Cable (0.5m) x 2
• USB 3.0 Cable (2m)
• Quick Guide
• T2-M48 Extender (16.5mm)
• T2 Extender (21mm)
• M42-M48 adapter
• T2-1.25″ adapter
• Spacer x 4
• Cover

Manuals & Warranty

ZWO 2-Years Warranty