The Olympus OM-D E-M1 is 6.4 mm wider, 4.5 mm shorter, 12.4 mm thinner and 37 g heavier than the Nikon D3300.
| Nikon D3300 | Olympus OM-D E-M1 | |
|---|---|---|
| Size (W × H × D) | 124 × 98 × 75.5 mm | 130.4 × 93.5 × 63.1 mm |
| Weight | 460 g | 497 g |
| Lens | Nikon F | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2014 | 2013 |