The Olympus OM-D E-M5 Mark III is 5.8 mm narrower, 11.2 mm shorter, 30.1 mm thinner and 244 g lighter than the Sony A7 IV.
| Sony A7 IV | Olympus OM-D E-M5 Mark III | |
|---|---|---|
| Size (W × H × D) | 131.1 × 96.4 × 79.8 mm | 125.3 × 85.2 × 49.7 mm |
| Weight | 658 g | 414 g |
| Lens | Sony E | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2021 | 2019 |