ZWO ASI220MM Mini USB Guide Camera

SKU: ASI220MINI Categories: , ,

The ASI 220 Mini Monochrome USB  Guide Camera can be regarded as an upgrade version of the ASI290Mini with a bigger sensor format, larger pixel size and better NIR sensitivity.

The ASI220MM Mini camera comes with a 1/1.8″ SC2210 sensor, ideal for a guide camera and offers excellent near infrared sensitivity and has a AR coated protective window.


Guide Camera Mini Series

A guide camera uses software to assist in control the telescope motors to keep track of a guide star to keep the telescope aligned. (For telescope mount systems with compatible motorised tracking available)


Key features:

  • Colour or Monochromatic: Monochrome
  • Fan Cooled: No
  • Sensor Model: SC2210_BW, CMOS
  • Sensor Size: 1/1/8 Inch (7.68 mm x 4.32 mm)
  • Resolution: 1920 x 1080
  • Megapixel: 2.07
  • Pixel Size: 4 micrometers (µm)
  • Max Analogue to Digital Converter Resolution: 12 bit


$449.00 inc GST

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The ASI220Mini Guide Camera is the mini version which has the ability to fit / connect to different types of equipment such as guide scopes and Off Axis Guiders.

The ASI220MM Mini is designed for precise guiding. The 2.9um pixel size gives you a higher arcsec/pixel than the ASI224 or ASI120 camera. This means that, in the same guide scope, the ASI290MM Mini can detect movement of stars to a higher degree than the other cameras. ASI290MM Mini will improve your guiding precision with around 30% compared to the ASI120MM Mini.



How to choose a good guide camera?

The camera size, stability and ease-of-use as well as its ability to fit with different types of equipment eg; guide scopes, OAG etc.

The most important traits. Let’s face it, when you set up your equipment for a night of imaging, you just want things to work and to see that smooth graph on your guiding software before you start your imaging sequence.

In order to do that, there are some things to consider (apart from the points mentioned above):

  • Sensitivity – Sensitivity is the first thing to consider. This is the crucial ability when looking for a star to guide on, so from the beginning ZWO were set on using monochrome sensors to design their guide cameras.
  • Precise guiding – detect movement of stars to a higher degree than the other cameras.
  • Big FOV (field of view) – This is very useful when looking for a star to guide on, using an OAG. When you use an OAG-guider with a Ritchey-Chretien or Schmit-Cassegrain telescope, the hardest part is to find a suitable guide star.


It is not recommended for primarily deep space photography, AOC suggest a fan cooled model for all deep space object long exposure photography.

In the box:

  • Camera body ASI220MM Mini
  • 1.25″ cover
  • 1.25″ extender
  • M28.5-CS adapter
  • Quick guide
  • ST4 cable
  • USB2 Type C cable (0.5m)
  • USB2 Type C cable (2.0m)



Sensor Type 1/1.8 SC2210_BW
Diagonal 8.81mm
Resolution 2.07MP 1920 x 1080
Diagonal 8.81mm
Pixel Size 4um
Image area 7.68mm x 4.32mm
Max FPS at full resolution 14 fps
Shutter Rolling shutter
Exposure Range 32us – 10s
Read Noise 0.6 – 3.2e
QE peak 92%
Full well 8.78ke
ADC 12 bit
Interface USB2 Type C
Adapters 1.25″ / M28.5 x 0.6
Protect window 21-1.1 AR
Dimensions 36mm x 61mm
Weight 60g
Back Focus Distance 8.5mm / 12.5mm
Supported OS Win7/8/10 32&64, Linux, Mac
Working Temperature -5 to 50 Deg C
Working humidity 0-80%