The Olympus OM-D E-M5 Mark III is 5.3 mm wider, 18.3 mm taller, 10 mm thinner and 11 g heavier than the Sony Alpha a6400.
| Sony Alpha a6400 | Olympus OM-D E-M5 Mark III | |
|---|---|---|
| Size (W × H × D) | 120 × 66.9 × 59.7 mm | 125.3 × 85.2 × 49.7 mm |
| Weight | 403 g | 414 g |
| Lens | Sony E | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2019 | 2019 |