ZWO ASI120MM Monochrome


ZWO’s ASI120MM is a very fast and sensitive USB2.0 monochrome camera perfect for high resolution lunar, planetary and solar imaging. It delivers up to 30FPS at 1280X960 full resolution.
The ZWO ASI120MM is extremely sensitive with a peak QE of 75% showing no fixed pattern noise (FPN).
In addition the ZWO cameras have a built in ST4 autoguiding port meaning you can also use it for autoguiding with a dedicated imaging camera.

SKU: ASI120MM Category: Tags: ,


When getting starting in astrophotography there are so many options when it comes to choosing a camera. With a ZWO ASI120MM camera you get amazing versatility including:
Fast frame rate and superb resolution for exquisite planetary, lunar and solar imaging (using a properly filtered telescope).
Long exposure imaging of many brighter deep sky  treasures thanks to the ASI120MM’s high quantum efficiency and 12bit output.
The ability to capture all sky views of satellites and bright meteors using the supplied 150° wide angle C-mount lens.
Autoguiding your mount in conjunction with a dedicated DSLR or cooled CCD camera using the in-built ST4 compatible autoguider port found on all ZWO cameras.
This camera from ZWO is a real “all-rounder” and represents outstanding value for money.

The ZWO ASI120MM camera uses a monochrome 1/3″ CMOS MT9M034 sensor, with a pixel array of 1280 x 960 and a pixel size of 3.75µm. The sensor has outstanding sensitivity with a peak QE of 75%!

MT9M034 QE
MT9M034 QE

Included 2.1mm Fish-eye lens

A major bonus is the inclusion of a 150º wide angle lens attachment allowing you to use the ASI120MM even without a telescope! When connected to the camera, you can do super wide angle shots similar to that produced by an all-sky camera. Capture images of the Milky Way stretched overhead, or record satellite passes or bright meteors as they flash overhead.

2.1mm All Sky Image
2.1mm All Sky Image

High Resolution Solar System Imaging – par excellence!

The ZWO ASI120MM camera is a proven performer when it comes to imaging the planets, Moon and Sun. The sensor can deliver up to 35 fps at full resolution and a staggering 215 frames per second at reduced resolution (340 x 240). The wide range of capture resolution settings available with this camera allows you to go from planetary imaging to deep-sky quickly and easily, without the need for another camera.

Some fine examples of planetary images captured with the ASI120MM.

ASI120MM/MC Jupiter
ASI120MM/MC Jupiter
ASI120MM/MC Saturn
ASI120MM/MC Saturn

Supports Region of Interest (ROI)

The ZWO ASI120MM allows you to choose a smaller region of interest that can be captured at a much faster frame rate compared to full resolution. This is useful for planetary imaging where even at very long effective focal lengths the desired target only occupies a small part of the entire sensor area.

In such instances you can specify a smaller ROI and capture at a very fast frame rate. This allows you to capture a sequence of videos through red, green and blue filters in a very short period of time avoiding problems of colour channels not aligning properly due to Jupiter’s very fast rotation.

It also means the captured sequences don’t take up as much storage space.

The different ROI options are shown under the specifications tab.

The beautiful red housing of the ASI120MM is made of aluminum, and sports a USB and ST4-type auto guider port. 6.5-foot cables for both are included in the box. The 2″ interface has M42X0.75 internal threads. A standard M42 to 1.25″ nosepiece rounds out the package. The underside of the camera has one 1/4-20 thread in its center, and four M4 threads evenly spaced around the outside edge.

This camera comes with a 2m long USB cable, a 2m long ST4 guider cable, 1.25″ clear window, 150º wide angle lens attachment, Driver & Software CD, and a M42-1.25″ nosepiece. Software on the CD includes the users manual, Windows camera driver, ASCOM Driver, SharpCap Image Capturing Software, FireCapture Image Capturing software, and Stakkert 2 Stacking Software.

NOTE: If you have a USB3.0 on your computer please consider the ASI120MM-S USB3.0 camera. The ASI120MM is not recommended for USB3.0 ports and may not operate correctly or at all.

ZWO ASI120MM Specifications

1/3″ CMOS MT9M034 (mono)
Pixel Array 1280 x 960
Pixel Size 3.75µm
Exposure Range 64µs-1000s
Bit Depth 12 bit output (12bit ADC)
ROI Supported
Interface USB2.0
Adapter 2″ / 1.25″ / M42X0.75
Well Depth 13,000e
Read Noise 6e
Dimensions φ62mm X 28mm
Weight 100g

Additional information

Weight 0.5 kg


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