The Olympus OM-D E-M1 Mark III is 7.2 mm wider, 4.7 mm shorter, 4.8 mm thinner and 70 g lighter than the Sony A7 III.
| Sony A7 III | Olympus OM-D E-M1 Mark III | |
|---|---|---|
| Size (W × H × D) | 126.9 × 95.6 × 73.7 mm | 134.1 × 90.9 × 68.9 mm |
| Weight | 650 g | 580 g |
| Lens | Sony E | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2018 | 2020 |