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ZWO ASI 290 Monochrome CMOS Telescope Camera

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  • Regular price $399.00

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  • Pixel Size: 2.9 Microns
  • Pixel Array: 2.1 Mega Pixels; 1936 x 1096
  • Sensor: IMX290LQR
  • High efficiency low cost great value Monochrome CMOS Camera


ZWO ASI 290 Monochrome CMOS Telescope Camera

The ASI-290MM Monochrome Astronomy Camera USB 3.0 by ZWO:


This splendid quality CMOS camera is a testament to low expense, high quality astronomical imaging technology. Perfect for any astronomer interested in getting into Astro-Imaging, the ZWO ASI-290 is a quality machine using incredibly efficient sensor technology! It utilizes a new 2.9 micrometer-square unit pixel which has been developed that combines a back-illuminated structure with technology for improving near infrared sensitivity to further enhance picture quality at low illumination while at the same time realizing Full HD cameras for industrial applications. This realizes two or more times the sensitivity in the visible-light region and three or more times the sensitivity in the near infrared light region than that of the existing Sony product (IMX290LQR). What that means is that this sensor has radically improved image quality and efficiency without any increase in size or price from previous generations.

One of the most impressive features of this imaging sensor is it's incredibly low Read Noise at 1.0. Read Noise is interference in your pixels, distortion in the image, and general interference with your camera's final result before it reaches you. At only 1 electron of Read Noise, the image produced by this camera at the end result is remarkably free of interference, a stellar trait that really does maximize the efficiency of this camera's sensor.

At only 6.46 millimeters, the sensor used in this camera is tiny- lending itself to the highly compact design of the camera as a whole. Most of the time with an astronomy Camera, a small sensor is taken as meaning poor images. 

But here, that's not true at all. This tiny sensor packs a good solid punch, due heavily to the low read noise that leaves images at near their full potential quality. It is capable of full HD imaging at 170 FPS, blazingly fast for the resolutions its operating at! And that is its maximum FPS, when operating at the absolute limit of its resolution- at lower resolutions, it may be even faster! It supports a wide range of resolutions which will be listed below- but its optimal resolution is 1936 x 1096.

Full Specifications and Features List:

  • Pixel Size: 2.9 micrometers
  • Exposure Range: 32 us to 2000s
  • ROI: Supported
  • ST4 Guider Port: Yes
  • Focus Distance to Sensor: 12.5 mm
  • Shutter Type: Rolling Shutter
  • Protect window: AR coated window
  • Operating System Compatibility: Mac, Windows, Linux
  • Bit rate: 12-bit output (12-bit ADC)
  • Dimensions: 62 mm x 36 mm
  • Weight: 120 g or 4.2-ounces (without lens)
  • Read Noise: 1e at 30 db gain, 3.2 at zero gain
  • Full Well: 14.6ke
  • ADC: 12-bit

Supported Resolutions and FPS at those Resolutions:

                          12 bit/ 10 bit)

  • 1936 x 1096: 82.2/ 170
  • 1280 x 960: 93.6/ 193.9
  • 640 x 480: 184/ 381.2
  • 320 x 240: 355.9/ 737.5
  • 2 x 2 Bin :968 x 548: 82.2/ 170
  • More resolutions can be user defined



ADC12 bit
Back focus12.5mm
Bayer MatrixMonochrome
Camera ConnectionM42 x 0.75mm
Dimensions62mm x 36mm
Dynamic Range12 Stops
Free ShippingYes
Full Rez Frame Rate170fps
Full Well14.6ke
InterfaceUSB 3.0
Max Frame Rate170fps
Maximum Exposure Time2000s
Mega Pixels2.1 mp
Minimum Exposure Time32 us
Operating System CompatibilityLinux (3rd Party) & Mac & Windows
Pixel Array1936 x 1096
Pixel Size2.9 microns
Power Consumption12V 2A max
Read Noise3.2e
Sensor Diagonal6.5mm
Sensor TypeCMOS
SensorSony IMX290LQR
Shutter TypeRolling Electronic
Weight0.264 lbs


  • ZWO ASI290MM Camera Body
  • 2 m long ST4 guider cable
  • 1.25-inch Cover
  • M42 x 1.25-inch, T-Mount
  • 2 m long USB 3.0 cable
  • Driver and Extra Software CD (Mac, PC, and Linux Compatible)