The Canon EOS R100 is 17.8 mm narrower, 5.4 mm shorter, 0.1 mm thinner and 224 g lighter than the Olympus OM-D E-M1 Mark III.
| Olympus OM-D E-M1 Mark III | Canon EOS R100 | |
|---|---|---|
| Size (W × H × D) | 134.1 × 90.9 × 68.9 mm | 116.3 × 85.5 × 68.8 mm |
| Weight | 580 g | 356 g |
| Lens | Micro Four Thirds | Canon RF |
| Sensor | Four Thirds | — |
| Announced | 2020 | 2023 |