The Olympus OM-D E-M5 Mark II is 22.3 mm narrower, 38 mm shorter, 43.5 mm thinner and 484 g lighter than the Nikon D810.
| Nikon D810 | Olympus OM-D E-M5 Mark II | |
|---|---|---|
| Size (W × H × D) | 146 × 123 × 81.5 mm | 123.7 × 85 × 38 mm |
| Weight | 980 g | 496 g |
| Lens | Nikon F | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2014 | 2015 |