cameracomparison · 2-way
QHYCCD QHY294C Pro vs ZWO ASI585MC Pro
QHYCCD
QHY294C Pro
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.
ZWO
ASI585MC Pro
A strong fit for dedicated deep-sky imagers pairing with longer focal lengths where framing is tight.
Key differences
80% larger sensor
Larger pixels (4.63µm vs 2.9µm)
41% more resolution
Specifications
| Specification | QHYCCD QHY294C Pro | ZWO ASI585MC Pro |
|---|---|---|
| Sensor | ||
| Type | Dedicated Cooled | Dedicated Cooled |
| Sensor | Sony IMX294 | Sony IMX585 |
| Sensor tech | CMOS | CMOS |
| Format | 4/3" | 1/1.2-inch |
| Sensor size | 19.1×13.0mm | 11.2×6.3mm |
| Diagonal | 23.1mm | 12.8mm |
| Pixel size | 4.63µm | 2.90µm |
| Resolution | 4164×2796 | 3840×2160 |
| Megapixels | 11.7MP | 8.3MP |
| Color | Yes | Yes |
| Cooling | ||
| Cooled | Yes | Yes |
| Performance | ||
| Full well | 63700e⁻ | 40000e⁻ |
| Peak QE | 75% | 91% |
Advantages of QHYCCD QHY294C Pro
- Larger sensor (23.1mm vs 12.85mm diagonal) — wider field
- Larger pixels — better low-light per-pixel sensitivity
- Higher resolution (11.7MP vs 8.3MP)
Advantages of ZWO ASI585MC Pro
- Finer sampling at 2.9µm pixels
Best for — QHYCCD QHY294C 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 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 QHY294C 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 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 QHY294C Pro — 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.