cameracomparison · 2-way
Canon EOS Ra vs Canon EOS 90D
Canon
EOS 90D
A strong fit for photographers stepping into astro pairing with a broad range of focal lengths.
Key differences
62% larger sensor
Larger pixels (5.36µm vs 3.2µm)
-7% more resolution
Specifications
| Specification | Canon EOS Ra | Canon EOS 90D |
|---|---|---|
| Sensor | ||
| Type | Mirrorless | dslr |
| Sensor | — | Canon APS-C |
| Sensor tech | CMOS | CMOS |
| Format | Full Frame | APS-C |
| Sensor size | 36.0×24.0mm | 22.3×14.8mm |
| Diagonal | 43.3mm | 26.8mm |
| Pixel size | 5.36µm | 3.20µm |
| Resolution | 6720×4480 | 6960×4640 |
| Megapixels | 30.3MP | 32.5MP |
| Color | Yes | Yes |
| Cooling | ||
| Cooled | No | No |
| Performance | ||
| Full well | — | — |
| Peak QE | — | — |
Advantages of Canon EOS Ra
- Larger sensor (43.3mm 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
Best for — Canon EOS Ra
- 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 Ra — typical FOV & scale
- On 250mm refractor (wide)FOV: 8.25° × 5.50°Scale: 4.42"/px
- On 800mm SCT reducerFOV: 2.58° × 1.72°Scale: 1.38"/px
- On 2000mm SCT nativeFOV: 1.03° × 0.69°Scale: 0.55"/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 Ra — 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.