cameracomparison · 2-way
ZWO ASI585MC Pro vs ZWO ASI120MC-S
ZWO
ASI585MC Pro
A strong fit for dedicated deep-sky imagers 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
114% larger sensor
Finer pixels (2.9µm vs 3.75µm)
575% more resolution
Cooled sensor
Specifications
| Specification | ZWO ASI585MC Pro | ZWO ASI120MC-S |
|---|---|---|
| Sensor | ||
| Type | Dedicated Cooled | guide-camera |
| Sensor | Sony IMX585 | AR0130CS |
| Sensor tech | CMOS | CMOS |
| Format | 1/1.2-inch | 1/3" |
| Sensor size | 11.2×6.3mm | 4.8×3.6mm |
| Diagonal | 12.8mm | 6.0mm |
| Pixel size | 2.90µm | 3.75µm |
| Resolution | 3840×2160 | 1280×960 |
| Megapixels | 8.3MP | 1.2MP |
| Color | Yes | Yes |
| Cooling | ||
| Cooled | Yes | No |
| Performance | ||
| Full well | 40000e⁻ | 13000e⁻ |
| Peak QE | 91% | 50% |
Advantages of ZWO ASI585MC Pro
- Larger sensor (12.85mm vs 6mm diagonal) — wider field
- Finer sampling at 2.9µm pixels
- Higher resolution (8.3MP vs 1.23MP)
- Regulated cooling for long exposures
Advantages of ZWO ASI120MC-S
- Larger pixels — better low-light per-pixel sensitivity
Best for — ZWO ASI585MC Pro
- Longer focal lengths — tighter framing on small targets
- Well-sampled deep-sky at medium focal lengths
- Long-exposure deep-sky under any sky
- 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 ASI585MC Pro — typical FOV & scale
- On 250mm refractor (wide)FOV: 2.57° × 1.44°Scale: 2.39"/px
- On 800mm SCT reducerFOV: 0.80° × 0.45°Scale: 0.75"/px
- On 2000mm SCT nativeFOV: 0.32° × 0.18°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 ASI585MC Pro — recommended user
A strong fit for dedicated deep-sky imagers 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.