cameracomparison · 2-way
ZWO ASI294MC Pro vs ZWO ASI120MM Mini
ZWO
ASI294MC Pro
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.
ZWO
ASI120MM Mini
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.
Key differences
285% larger sensor
Larger pixels (4.63µm vs 3.75µm)
851% more resolution
Cooled sensor
Color vs mono
Specifications
| Specification | ZWO ASI294MC Pro | ZWO ASI120MM Mini |
|---|---|---|
| Sensor | ||
| Type | Dedicated Cooled | guide-camera |
| Sensor | Sony IMX294 | AR0130CS |
| Sensor tech | CMOS | CMOS |
| Format | 4/3" | 1/3" |
| Sensor size | 19.1×13.0mm | 4.8×3.6mm |
| Diagonal | 23.1mm | 6.0mm |
| Pixel size | 4.63µm | 3.75µm |
| Resolution | 4144×2822 | 1280×960 |
| Megapixels | 11.7MP | 1.2MP |
| Color | Yes | No |
| Cooling | ||
| Cooled | Yes | No |
| Performance | ||
| Full well | 63700e⁻ | 13000e⁻ |
| Peak QE | 75% | 80% |
Advantages of ZWO ASI294MC Pro
- Larger sensor (23.1mm vs 6mm diagonal) — wider field
- Larger pixels — better low-light per-pixel sensitivity
- Higher resolution (11.7MP vs 1.23MP)
- Regulated cooling for long exposures
- One-shot color — simpler workflow
Advantages of ZWO ASI120MM Mini
- Finer sampling at 3.75µm pixels
- Mono sensor — ideal for narrowband and LRGB
Best for — ZWO ASI294MC Pro
- Balanced field for most refractors
- Fast, low-noise deep-sky at short focal lengths
- Long-exposure deep-sky under any sky
- One-shot color — quick results, less processing
Best for — ZWO ASI120MM Mini
- Longer focal lengths — tighter framing on small targets
- Well-sampled deep-sky at medium focal lengths
- Narrowband and LRGB workflows
ZWO ASI294MC Pro — typical FOV & scale
- On 250mm refractor (wide)FOV: 4.38° × 2.98°Scale: 3.82"/px
- On 800mm SCT reducerFOV: 1.37° × 0.93°Scale: 1.19"/px
- On 2000mm SCT nativeFOV: 0.55° × 0.37°Scale: 0.48"/px
ZWO ASI120MM Mini — typical FOV & scale
- On 250mm refractor (wide)FOV: 1.10° × 0.83°Scale: 3.09"/px
- On 800mm SCT reducerFOV: 0.34° × 0.26°Scale: 0.97"/px
- On 2000mm SCT nativeFOV: 0.14° × 0.10°Scale: 0.39"/px
ZWO ASI294MC Pro — recommended user
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.
ZWO ASI120MM Mini — recommended user
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.