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ZWO ASI 120 Super Speed Color CMOS Telescope Camera

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ZWO ASI 120 Super Speed Color CMOS Telescope Camera

The  ASI120S Super Speed Sensitive Color CMOS Camera - USB 3.0 by ZWO:

A versatile camera has just become faster! Featuring a USB 3.0 connection, image download times are lightning fast. The ZWO ASI120 Super Speed Sensitive Color camera is a perfect choice for lunar and planetary imaging and features a CMOS sensor sensitive enough to capture bright deep-sky objects. Truly a "do it all" camera at an incredible price making it the clear choice for the serious beginning or intermediate astrophotographer.

The ASI120MC-S is built on a 1/3 inch CMOS AR0130S full color sensor. Capable of producing single shot images in full color without the need for color filters. The pixel array of 1280x960 and a pixel size of 3.75 micron square, this camera is capable of capturing moderately wide fields with the included 150-degree wide angle lens adapter. Peak QE is 75-percent with absolutely no fixed pattern noise. Protecting the sensor is an IR-cut window.

An ultra fast incarnation of its predecessor, the ZWO ASI120S has the ability to deliver frames at 254 per second with reduced resolution or 60 frames per second at full resolution. This wide range of resolution and capture settings allows you to switch from planetary and lunar imaging to DSO's easily without having to weigh down your set up with an additional camera.

Housed in a gorgeous metallic red aluminum housing with both a USB 3.0 and ST4 autoguider port 6.5-foot cables for both are included as are a 2-inch M42x0.75 threaded interface and standard M42 to 1.25-inch nosepiece. A 1/4-20 thread in the center bottom of the camera makes for easy attachment to a wide variety of camera mounts and tripods. 4 M4 threads offer additional mounting positions, along the outside edge.


This camera will include:

  • 2 m long USB 3.0 cable
  • 2 m long ST4 guider cable
  • 1.25-inch IR-cut window
  • 150-degree wide-angle lens-adapter
  • Driver and Software -On-line link is in the "INCLUDED ITEMS" Tab above. 
  • M42 to 1.25-inch nosepiece


The Software on the CD includes:

  • A user manual
  • Windows camera driver
  • ASCOM driver
  • SharpCap image capture software
  • FireCapture image capture software
  • Stakkert 2 stacking software for post processing




ADC12 bit
Back focus12.5mm
Bayer MatrixColor
Camera ConnectionM42 x 0.75
Camera SeriesZWO ASI
Delta T45°C Below Ambient
Dimensions2.44 x 1.1 in.
Dynamic Range11.1 Stops
Free ShippingYes
Full Rez Frame Rate60fps
Full Well14.5ke
Included SoftwareSharpCap & FireCapture & Stakkert 2
InterfaceUSB 3.0
Max Frame Rate254fps
Maximum Exposure Time1000 seconds
Mega Pixels1.2 mp
Minimum Exposure Time0.000064 seconds
Operating System CompatibilityWindows
Peak QE68%
Pixel Array1280 x 960
Pixel Size3.75 microns
Power Consumption5V 1.5A USV
Read Noise6.6e
Sensor Diagonal6mm
Sensor TypeCMOS
SensorON Semiconductor AR0130CS
Warranty1 Year Warranty
Weight0.22 lbs



  • ASI120MC-S Camera
  • 2 m long ST4 guider cable 
  • 2 m long USB 3.0 cable
  • 1.25-inch IR-cut window
  • 150-degree wide-angle lens-adapter
  • Driver and Software CD
  • M42 to 1.25-inch nosepiece
  • On Line User Manual - Link Here

ZWO ASI 120 Super Speed Color CMOS Telescope Camera



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Duane H.
United States


Overall, this CMOS has performed admirably. I used both "SmartCap" and "FireCap" imaging programs. It worked well with both. Used Autostakkert-2 to stack and align videos. Concentrated on imaging Lunar crater "CLAVIUS" and gave a superb finished photo! Wish OPT would put up a site to submit photos, one picture is still worth a thousand words. The item was well packaged and actually arrived a day ahead of schedule, thanks OPT that's what keeps us coming back. D. Harris, Colo. USA.