The Olympus OM-D E-M10 Mark IV is 9.4 mm narrower, 11.8 mm shorter, 30.8 mm thinner and 275 g lighter than the Sony A7 IV.
| Sony A7 IV | Olympus OM-D E-M10 Mark IV | |
|---|---|---|
| Size (W × H × D) | 131.1 × 96.4 × 79.8 mm | 121.7 × 84.6 × 49 mm |
| Weight | 658 g | 383 g |
| Lens | Sony E | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2021 | 2020 |