cameracomparison · 2-way
QHYCCD QHY9 vs ZWO ASI294MM Pro
ZWO
ASI294MM Pro
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.
Key differences
Larger pixels (5.4µm vs 4.63µm)
-82% more resolution
Specifications
| Specification | QHYCCD QHY9 | ZWO ASI294MM Pro |
|---|---|---|
| Sensor | ||
| Type | dedicated | Dedicated Cooled |
| Sensor | Kodak KAF-8300 | Sony IMX492 |
| Sensor tech | CCD | CMOS |
| Format | 4/3" | 4/3" |
| Sensor size | 18.0×13.5mm | 19.1×13.0mm |
| Diagonal | 22.5mm | 23.1mm |
| Pixel size | 5.40µm | 4.63µm |
| Resolution | 3358×2536 | 8288×5644 |
| Megapixels | 8.5MP | 46.8MP |
| Color | No | No |
| Cooling | ||
| Cooled | Yes | Yes |
| Performance | ||
| Full well | 25500e⁻ | 63700e⁻ |
| Peak QE | 56% | 75% |
Advantages of QHYCCD QHY9
- Larger pixels — better low-light per-pixel sensitivity
Advantages of ZWO ASI294MM Pro
- Finer sampling at 4.63µm pixels
- Higher resolution (46.8MP vs 8.5MP)
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 ASI294MM Pro
- 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
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 ASI294MM 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
QHYCCD QHY9 — recommended user
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.
ZWO ASI294MM Pro — recommended user
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.