ZWO ASI 120 Super Speed Monochrome CMOS Telescope Camera

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  • $179.00
  • Regular price $199.00

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  • The ZWO ASI120MM-S Super Speed camera features a monochrome CMOS sensor and USB 3.0.
  • 1.2MP CMOS sensor has an array of 1280 x 960 and 3.5 micron square pixels. Peak Quantum Efficiency is 75-percent
  • Absolutely no fixed pattern noise!
  • Ultra fast download speeds up to 254 frames per second.
  • 60 frames per second at full resolution.



ZWO ASI 120 Super Speed Monochrome CMOS Telescope Camera

An ultra fast incarnation of its predecessor, the ZWO ASI120S camera has the ability to deliver frames at 254 per second with reduced resolution or 60 frames per second at full resolution (tested without overclocking, with USB 3.0). 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 gorgeous metallic red aluminum with both a USB and ST4 autoguider port. Both ports have 6.5-foot cables included, as well as a 2-inch M42x0.75 threaded interface, and a 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 along the outside edge offer additional mounting positions.

With the USB 3.0 connection, image download times are lightning fast.

The ZWO ASI120 Super Speed Monochrome camera is a perfect choice for lunar and planetary imaging. It 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 ASI120MM-S is built on a 1/3 inch CMOS AR0130S monochrome sensor. Beautiful details are revealed in high resolution black and white. Pair with a filter wheel to capture each color or narrowband and stack images as you choose.

The pixel array of 1280 x 960 and a pixel size of 3.75 micron square, make this camera capable of capturing moderately wide fields when used 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.


OPT Product Number: ZWO-ASI120MM-S


ADC12 bit
Back focus12.5mm
Bayer MatrixMonochrome
Camera ConnectionM42 x 0.75
Camera SeriesZWO ASI
Delta T45°C Below Ambient
Dimensions2.44 x 1.1 in.
Dynamic Range12 Stops
Free ShippingYes
Full Rez Frame Rate60fps
Full Well20ke
Included SoftwareSharpCap & FireCapture & Stakkert 2
Integrated GuiderIntegrated Guider
InterfaceUSB 3.0
Max Frame Rate215fps
Mega Pixels1.2 mp
Operating System CompatibilityWindows
Peak QE75%
Pixel Array1280 x 960
Pixel Size3.75 microns
Power Consumption12V 2A max
Read Noise3.7e
Sensor Diagonal6mm
Sensor TypeCMOS
SensorON Semiconductor MT9M034
Shutter TypeDigital
Warranty1 Year Warranty
Weight0.22 lbs




  • ZWO ASI120MM-S Monochrome 1.2 Mega Pixel Astronomy Camera
  • 150-degree Lens Adapter for use as an all-sky camera
  • M42 to 1.25-inch nosepiece
  • 1.25-inch IR-cut window
  • 2 m long USB cable
  • 2 m long ST4 guider cable
  • Driver and Extra Software CD



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Ask a Question
  • Will it work with windows 10?

    The manufacturer states their software will work with Windows 10.

  • Will this work with the Celestron Alt-Az mounts like the Nexstar go-to ones?

    Yes, it will work but, you will need to have the mount on an equatorial wedge to achieve accurate tracking.

  • Does the ZWO ASI120S Super Speed Monochrome Camera USB 3.0 work as an autoguider as well as a planetary camera? Thanks.

    Yes the ZWO ASI120S can also be used as an autoguider.

  • Is there a focal reducer available for this Astro-Tech AT130, f/6 FPL-53 ED Triplet Apochromatic Refractor?

    The manufacturer never made a matched focal reducer for this telescope, and reducers from other manufacturers only have a limited success due to the 130 f/6's fast native focal ratio. a 1 x flattener would generally have superior optical performance to a

  • Is it possible to attach a Nikon DSLR lens to this camera? Also, is it possible to remove the IR cut filter from this camera?

    This camera dose not have the back focus to accommodate a DSLR Lens

  • Will the USB 3.0 camera work with a USB 2.0 port?

    According to ZWO site this model supports USB 3 and 2.0. Don't expect max FPS with the max resolution. Sensor: 1/3? CMOS AR0130CS(Color) / MT9M034(mono) Resolution: 1.2Mega Pixels 1280×960 Pixel Size: 3.75µm Exposure Range: 64µs-1000s ROI: Supporte

  • It says this camera has an IR cut sensor window. Will this interfere with imaging hydrogen alpha either through a narrow band filter or a solar telescope?

    It will not interfere in any practical way. H-alpha is safely within the visible portion of the spectrum, and any attenuation it will see from the IR-cut filter over the CMOS sensor in this camera will be insignificant relative to solar-imaging. The same

  • Will this work with PHD on a Mac?

    there is PHD2 on Mac support ASI120MC-S ASI120MM-S for guiding and oaCapture for plantery imaging

  • Will this work with PHD on a Mac?

    Unfortunately, the current ZWO drivers will only work on Windows OS as they use either a directshow or ASCOM driver. There may be plans for OS-X drivers in the future, but there have not been any official announcements yet. They do have both a Mac and Lin

  • Is this adaptable with C mount lenses?

    actually, the adapter come with ASI camera is T to CS adapter. so you need another CS-C adapter to use C lens. the difference between C and CS interface is only the back focus of C is 5 mm longer than CS

  • Is this adaptable with C mount lenses?

    The camera comes with a T- to C mount adapter (the included fisheye lens is a C mount lens), but the included adapter is too short to reach infinity focus with most C mount lenses. The adapter could be shimmed underneath or a longer adapter could be made