cameracomparison · 2-way
QHYCCD QHY9 vs ZWO ASI585MC Pro
ZWO
ASI585MC Pro
A strong fit for dedicated deep-sky imagers pairing with longer focal lengths where framing is tight.
Key differences
75% larger sensor
Larger pixels (5.4µm vs 2.9µm)
Mono vs color
Specifications
| Specification | QHYCCD QHY9 | ZWO ASI585MC Pro |
|---|---|---|
| Sensor | ||
| Type | dedicated | Dedicated Cooled |
| Sensor | Kodak KAF-8300 | Sony IMX585 |
| Sensor tech | CCD | CMOS |
| Format | 4/3" | 1/1.2-inch |
| Sensor size | 18.0×13.5mm | 11.2×6.3mm |
| Diagonal | 22.5mm | 12.8mm |
| Pixel size | 5.40µm | 2.90µm |
| Resolution | 3358×2536 | 3840×2160 |
| Megapixels | 8.5MP | 8.3MP |
| Color | No | Yes |
| Cooling | ||
| Cooled | Yes | Yes |
| Performance | ||
| Full well | 25500e⁻ | 40000e⁻ |
| Peak QE | 56% | 91% |
Advantages of QHYCCD QHY9
- Larger sensor (22.5mm vs 12.85mm diagonal) — wider field
- Larger pixels — better low-light per-pixel sensitivity
- Mono sensor — ideal for narrowband and LRGB
Advantages of ZWO ASI585MC Pro
- Finer sampling at 2.9µm pixels
- One-shot color — simpler workflow
Best for — QHYCCD QHY9
- Balanced field for most refractors
- Fast, low-noise deep-sky at short focal lengths
- Long-exposure deep-sky under any sky
- Narrowband and LRGB workflows
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
QHYCCD QHY9 — typical FOV & scale
- On 250mm refractor (wide)FOV: 4.13° × 3.09°Scale: 4.46"/px
- On 800mm SCT reducerFOV: 1.29° × 0.97°Scale: 1.39"/px
- On 2000mm SCT nativeFOV: 0.52° × 0.39°Scale: 0.56"/px
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
QHYCCD QHY9 — recommended user
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.
ZWO ASI585MC Pro — recommended user
A strong fit for dedicated deep-sky imagers pairing with longer focal lengths where framing is tight.