cameracomparison · 2-way
ZWO ASI662MC vs ZWO ASI120MC-S
ZWO
ASI662MC
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.
ZWO
ASI120MC-S
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.
Key differences
8% larger sensor
Finer pixels (2.9µm vs 3.75µm)
68% more resolution
Specifications
| Specification | ZWO ASI662MC | ZWO ASI120MC-S |
|---|---|---|
| Sensor | ||
| Type | dedicated | guide-camera |
| Sensor | Sony IMX662 | AR0130CS |
| Sensor tech | CMOS | CMOS |
| Format | 1/2.8" | 1/3" |
| Sensor size | 5.6×3.2mm | 4.8×3.6mm |
| Diagonal | 6.5mm | 6.0mm |
| Pixel size | 2.90µm | 3.75µm |
| Resolution | 1920×1080 | 1280×960 |
| Megapixels | 2.1MP | 1.2MP |
| Color | Yes | Yes |
| Cooling | ||
| Cooled | No | No |
| Performance | ||
| Full well | 38000e⁻ | 13000e⁻ |
| Peak QE | 91% | 50% |
Advantages of ZWO ASI662MC
- Finer sampling at 2.9µm pixels
- Higher resolution (2.07MP vs 1.23MP)
Advantages of ZWO ASI120MC-S
- Larger pixels — better low-light per-pixel sensitivity
Best for — ZWO ASI662MC
- Longer focal lengths — tighter framing on small targets
- Well-sampled deep-sky at medium focal lengths
- One-shot color — quick results, less processing
Best for — ZWO ASI120MC-S
- Longer focal lengths — tighter framing on small targets
- Well-sampled deep-sky at medium focal lengths
- One-shot color — quick results, less processing
ZWO ASI662MC — typical FOV & scale
- On 250mm refractor (wide)FOV: 1.28° × 0.73°Scale: 2.39"/px
- On 800mm SCT reducerFOV: 0.40° × 0.23°Scale: 0.75"/px
- On 2000mm SCT nativeFOV: 0.16° × 0.09°Scale: 0.30"/px
ZWO ASI120MC-S — 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 ASI662MC — recommended user
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.
ZWO ASI120MC-S — recommended user
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.