cameracomparison · 2-way
Canon EOS R6 Mark II vs Canon EOS 90D
Canon
EOS R6 Mark II
A strong fit for photographers stepping into astro pairing with wide-field refractors.
Canon
EOS 90D
A strong fit for photographers stepping into astro pairing with a broad range of focal lengths.
Key differences
61% larger sensor
Larger pixels (5.94µm vs 3.2µm)
-26% more resolution
Specifications
| Specification | Canon EOS R6 Mark II | Canon EOS 90D |
|---|---|---|
| Sensor | ||
| Type | Mirrorless | dslr |
| Sensor | — | Canon APS-C |
| Sensor tech | CMOS | CMOS |
| Format | Full Frame | APS-C |
| Sensor size | 35.9×23.9mm | 22.3×14.8mm |
| Diagonal | 43.1mm | 26.8mm |
| Pixel size | 5.94µm | 3.20µm |
| Resolution | 6000×4000 | 6960×4640 |
| Megapixels | 24.2MP | 32.5MP |
| Color | Yes | Yes |
| Cooling | ||
| Cooled | No | No |
| Performance | ||
| Full well | — | — |
| Peak QE | — | — |
Advantages of Canon EOS R6 Mark II
- Larger sensor (43.1mm vs 26.8mm diagonal) — wider field
- Larger pixels — better low-light per-pixel sensitivity
Advantages of Canon EOS 90D
- Finer sampling at 3.2µm pixels
- Higher resolution (32.5MP vs 24.2MP)
Best for — Canon EOS R6 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 — Canon EOS 90D
- Balanced field for most refractors
- Well-sampled deep-sky at medium focal lengths
- One-shot color — quick results, less processing
Canon EOS R6 Mark II — typical FOV & scale
- On 250mm refractor (wide)FOV: 8.23° × 5.48°Scale: 4.90"/px
- On 800mm SCT reducerFOV: 2.57° × 1.71°Scale: 1.53"/px
- On 2000mm SCT nativeFOV: 1.03° × 0.68°Scale: 0.61"/px
Canon EOS 90D — typical FOV & scale
- On 250mm refractor (wide)FOV: 5.11° × 3.39°Scale: 2.64"/px
- On 800mm SCT reducerFOV: 1.60° × 1.06°Scale: 0.83"/px
- On 2000mm SCT nativeFOV: 0.64° × 0.42°Scale: 0.33"/px
Canon EOS R6 Mark II — recommended user
A strong fit for photographers stepping into astro pairing with wide-field refractors.
Canon EOS 90D — recommended user
A strong fit for photographers stepping into astro pairing with a broad range of focal lengths.