The Nikon Z5 II is 5.3 mm narrower, 11.6 mm taller, 26.2 mm deeper and 204 g heavier than the OM System OM-3.
| OM System OM-3 | Nikon Z5 II | |
|---|---|---|
| Size (W × H × D) | 139.3 × 88.9 × 45.8 mm | 134 × 100.5 × 72 mm |
| Weight | 496 g | 700 g |
| Lens | Micro Four Thirds | Nikon Z |
| Sensor | Four Thirds | — |
| Announced | 2025 | 2025 |