The Nikon D800 is 15.6 mm wider, 29.5 mm taller, 18.4 mm deeper and 503 g heavier than the Olympus OM-D E-M1.
| Olympus OM-D E-M1 | Nikon D800 | |
|---|---|---|
| Size (W × H × D) | 130.4 × 93.5 × 63.1 mm | 146 × 123 × 81.5 mm |
| Weight | 497 g | 1,000 g |
| Lens | Micro Four Thirds | Nikon F |
| Sensor | Four Thirds | — |
| Announced | 2013 | 2012 |