cameracomparison · 2-way
Player One Poseidon-M Pro vs Player One Mars-C II
Player One
Poseidon-M Pro
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.
Player One
Mars-C II
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.
Key differences
338% larger sensor
Larger pixels (3.76µm vs 2.9µm)
1161% more resolution
Cooled sensor
Mono vs color
Specifications
| Specification | Player One Poseidon-M Pro | Player One Mars-C II |
|---|---|---|
| Sensor | ||
| Type | dedicated | planetary |
| Sensor | Sony IMX571 | Sony IMX662 |
| Sensor tech | CMOS | CMOS |
| Format | APS-C | 1/2.8" |
| Sensor size | 23.5×15.7mm | 5.6×3.2mm |
| Diagonal | 28.3mm | 6.5mm |
| Pixel size | 3.76µm | 2.90µm |
| Resolution | 6248×4176 | 1920×1080 |
| Megapixels | 26.1MP | 2.1MP |
| Color | No | Yes |
| Cooling | ||
| Cooled | Yes | No |
| Performance | ||
| Full well | 50000e⁻ | 38000e⁻ |
| Peak QE | 80% | 91% |
Advantages of Player One Poseidon-M Pro
- Larger sensor (28.3mm vs 6.46mm diagonal) — wider field
- Larger pixels — better low-light per-pixel sensitivity
- Higher resolution (26.1MP vs 2.07MP)
- Regulated cooling for long exposures
- Mono sensor — ideal for narrowband and LRGB
Advantages of Player One Mars-C II
- Finer sampling at 2.9µm pixels
- One-shot color — simpler workflow
Best for — Player One Poseidon-M Pro
- Balanced field for most refractors
- Well-sampled deep-sky at medium focal lengths
- Long-exposure deep-sky under any sky
- Narrowband and LRGB workflows
Best for — Player One Mars-C II
- Longer focal lengths — tighter framing on small targets
- Well-sampled deep-sky at medium focal lengths
- One-shot color — quick results, less processing
Player One Poseidon-M Pro — typical FOV & scale
- On 250mm refractor (wide)FOV: 5.39° × 3.60°Scale: 3.10"/px
- On 800mm SCT reducerFOV: 1.68° × 1.12°Scale: 0.97"/px
- On 2000mm SCT nativeFOV: 0.67° × 0.45°Scale: 0.39"/px
Player One Mars-C II — 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
Player One Poseidon-M Pro — recommended user
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.
Player One Mars-C II — recommended user
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.