ZWO ASI120MM Mini Monochrome Guide Camera

The ZWO ASI120MM Mini is a compact, lightweight monochrome guide camera engineered for reliable autoguiding and entry-level planetary imaging. Built around the AR0130CS 1/3" CMOS sensor, it delivers strong sensitivity, low read noise and stable guiding performance — making it one of the most trusted starter guide cameras available.

Sensor & Performance

The ASI120MM Mini integrates the AR0130CS sensor (4.8mm × 3.6mm) with 1280 × 960 resolution and 3.75µm pixels. A 12-bit ADC and peak quantum efficiency approaching 80% allow the camera to detect faint guide stars quickly and consistently, even in less-than-ideal sky conditions.

• Sensor: AR0130CS (1/3") monochrome CMOS
• Resolution: 1280 × 960
• Pixel size: 3.75µm
• 12-bit ADC
• QE peak ~80%

Optimised for Guiding

The slim cylindrical “mini” body fits directly into 1.25" guide focusers and off-axis guider (OAG) systems. It reaches focus at approximately the same position as a standard eyepiece, simplifying setup and reducing backfocus complications.

USB-C & ST4 Connectivity

• USB 2.0 Type-C connection
• ST4 autoguider port for direct mount control

The USB-C connection ensures secure and convenient connectivity, while the integrated ST4 port allows direct connection to compatible mounts for straightforward autoguiding.

Mechanical Design

What’s in the Box

• ASI120MM Mini camera
• 1.25" nosepiece
• M28.5-CS adapter
• CS-C adapter
• USB cable
• ST4 cable

Ideal For

• Guide scopes between 150mm and 300mm focal length
• Off-axis guider (OAG) systems
• Beginner to intermediate astrophotography setups
• Entry-level planetary imaging

Compact, sensitive and proven in the field, the ZWO ASI120MM Mini remains one of the most popular entry-level guide cameras for dependable autoguiding performance.