The Olympus OM-D E-M5 is 14.5 mm narrower, 16.9 mm shorter, 34.1 mm thinner and 365 g lighter than the Nikon D7100.
| Nikon D7100 | Olympus OM-D E-M5 | |
|---|---|---|
| Size (W × H × D) | 135.5 × 106.5 × 76 mm | 121 × 89.6 × 41.9 mm |
| Weight | 765 g | 400 g |
| Lens | Nikon F | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2013 | 2012 |