cameracomparison · 2-way
Canon EOS Ra Mark II vs ZWO ASI2600MM Pro
Canon
EOS Ra Mark II
A strong fit for photographers stepping into astro pairing with wide-field refractors.
ZWO
ASI2600MM Pro
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.
Key differences
53% larger sensor
Larger pixels (4.4µm vs 3.76µm)
72% more resolution
Uncooled
Color vs mono
Specifications
| Specification | Canon EOS Ra Mark II | ZWO ASI2600MM Pro |
|---|---|---|
| Sensor | ||
| Type | dslr | Dedicated Cooled |
| Sensor | Canon FF astro | Sony IMX571 |
| Sensor tech | CMOS | CMOS |
| Format | Full frame | APS-C |
| Sensor size | 36.0×24.0mm | 23.5×15.7mm |
| Diagonal | 43.3mm | 28.3mm |
| Pixel size | 4.40µm | 3.76µm |
| Resolution | 8192×5464 | 6248×4176 |
| Megapixels | 44.8MP | 26.1MP |
| Color | Yes | No |
| Cooling | ||
| Cooled | No | Yes |
| Performance | ||
| Full well | — | 50000e⁻ |
| Peak QE | — | 91% |
Advantages of Canon EOS Ra Mark II
- Larger sensor (43.3mm vs 28.3mm diagonal) — wider field
- Larger pixels — better low-light per-pixel sensitivity
- Higher resolution (44.8MP vs 26.1MP)
- One-shot color — simpler workflow
Advantages of ZWO ASI2600MM Pro
- Finer sampling at 3.76µm pixels
- Regulated cooling for long exposures
- Mono sensor — ideal for narrowband and LRGB
Best for — Canon EOS Ra Mark II
- Wide-field mosaics and full-frame telescopes
- Fast, low-noise deep-sky at short focal lengths
- One-shot color — quick results, less processing
Best for — ZWO ASI2600MM 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
Canon EOS Ra Mark II — typical FOV & scale
- On 250mm refractor (wide)FOV: 8.25° × 5.50°Scale: 3.63"/px
- On 800mm SCT reducerFOV: 2.58° × 1.72°Scale: 1.13"/px
- On 2000mm SCT nativeFOV: 1.03° × 0.69°Scale: 0.45"/px
ZWO ASI2600MM 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
Canon EOS Ra Mark II — recommended user
A strong fit for photographers stepping into astro pairing with wide-field refractors.
ZWO ASI2600MM Pro — recommended user
A strong fit for dedicated deep-sky imagers pairing with a broad range of focal lengths.