cameracomparison · 2-way
OM System OM-1 II vs Canon EOS R7
OM System
OM-1 II
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.
Canon
EOS R7
A strong fit for photographers stepping into astro pairing with a broad range of focal lengths.
Key differences
-19% larger sensor
-38% more resolution
Specifications
| Specification | OM System OM-1 II | Canon EOS R7 |
|---|---|---|
| Sensor | ||
| Type | dslr | dslr |
| Sensor | OM System 4/3 stacked BSI | Canon APS-C |
| Sensor tech | CMOS | CMOS |
| Format | 4/3" | APS-C |
| Sensor size | 17.4×13.0mm | 22.3×14.8mm |
| Diagonal | 21.8mm | 26.8mm |
| Pixel size | 3.35µm | 3.20µm |
| Resolution | 5184×3888 | 6960×4640 |
| Megapixels | 20.1MP | 32.5MP |
| Color | Yes | Yes |
| Cooling | ||
| Cooled | No | No |
| Performance | ||
| Full well | — | — |
| Peak QE | — | — |
Advantages of OM System OM-1 II
Closely matched on the compared specs.
Advantages of Canon EOS R7
- Larger sensor (26.8mm vs 21.8mm diagonal) — wider field
- Higher resolution (32.5MP vs 20.1MP)
Best for — OM System OM-1 II
- Longer focal lengths — tighter framing on small targets
- Well-sampled deep-sky at medium focal lengths
- One-shot color — quick results, less processing
Best for — Canon EOS R7
- Balanced field for most refractors
- Well-sampled deep-sky at medium focal lengths
- One-shot color — quick results, less processing
OM System OM-1 II — typical FOV & scale
- On 250mm refractor (wide)FOV: 3.99° × 2.98°Scale: 2.76"/px
- On 800mm SCT reducerFOV: 1.25° × 0.93°Scale: 0.86"/px
- On 2000mm SCT nativeFOV: 0.50° × 0.37°Scale: 0.35"/px
Canon EOS R7 — 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
OM System OM-1 II — recommended user
A strong fit for photographers stepping into astro pairing with longer focal lengths where framing is tight.
Canon EOS R7 — recommended user
A strong fit for photographers stepping into astro pairing with a broad range of focal lengths.