The Nikon D4 is 39 mm wider, 66.9 mm taller, 48.6 mm deeper and 940 g heavier than the Olympus OM-D E-M5.
| Olympus OM-D E-M5 | Nikon D4 | |
|---|---|---|
| Size (W × H × D) | 121 × 89.6 × 41.9 mm | 160 × 156.5 × 90.5 mm |
| Weight | 400 g | 1,340 g |
| Lens | Micro Four Thirds | Nikon F |
| Sensor | Four Thirds | — |
| Announced | 2012 | 2012 |