ZWO ASI294MM Pro
A versatile 4/3-inch mono camera with a clever dual mode: large sensitive pixels for faint nebulae, or a high-resolution 47-megapixel mode when you want fine detail, an accessible entry into mono imaging.
A deep-sky mono camera with a flexible sensor: big pixels for sensitivity on faint targets, or a high-resolution mode for detail.
$148 above 90-day low
Price tracked by PolarisObserved 28 timesTracking since Mar 2026
Same camera. Different telescope. A completely different photograph.
A camera has no field of view of its own, the telescope in front of it decides everything. Pick a target and watch the same 11.7-megapixel frame become three different images.
What it's best at — and the trade-offs.
The numbers, in plain English.
What it shines on.
Everything you'd actually buy.
How it scores, and why.
A flexible, sensitive mono sensor at a friendlier price than APS-C mono. The dual-mode sensor and mono workflow reward a patient imager.
Polaris weighs how well the camera does the job it was designed for — image quality, sensitivity, versatility and value — never list price or brand.
An honest fit check.
Full specifications.
The IMX492 has an unusual trick: in its native mode the pixels bin to 4.63 microns for high sensitivity and a huge full well, and it also unlocks a 47-megapixel high-resolution mode. That flexibility, plus a lower price than APS-C mono, makes it a common first mono camera.
For a different goal, start here.
ZWO ASI2600MM Pro
An APS-C mono sensor with 16-bit depth and no amp glow
QHY268M
The 26MP APS-C mono sensor for the highest image quality
ZWO ASI294MC Pro
The one-shot-colour version of the same sensor if mono is too much workflow