The OM System OM-3 is 0.1 mm narrower, 9.5 mm shorter, 42.6 mm thinner and 203 g lighter than the Canon EOS R6 Mark III.
| Canon EOS R6 Mark III | OM System OM-3 | |
|---|---|---|
| Size (W × H × D) | 139.4 × 98.4 × 88.4 mm | 139.3 × 88.9 × 45.8 mm |
| Weight | 699 g | 496 g |
| Lens | Canon RF | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2025 | 2025 |