The OM System OM-3 is 18.3 mm narrower, 60.6 mm shorter, 41.5 mm thinner and 619 g lighter than the Canon EOS R1.
| Canon EOS R1 | OM System OM-3 | |
|---|---|---|
| Size (W × H × D) | 157.6 × 149.5 × 87.3 mm | 139.3 × 88.9 × 45.8 mm |
| Weight | 1,115 g | 496 g |
| Lens | Canon RF | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2024 | 2025 |