The OM System OM-3 is 5.3 mm wider, 11.6 mm shorter, 23.7 mm thinner and 209 g lighter than the Nikon Z7 II.
| Nikon Z7 II | OM System OM-3 | |
|---|---|---|
| Size (W × H × D) | 134 × 100.5 × 69.5 mm | 139.3 × 88.9 × 45.8 mm |
| Weight | 705 g | 496 g |
| Lens | Nikon Z | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2020 | 2025 |