The Olympus OM-D E-M5 is 24.5 mm narrower, 18.2 mm shorter, 31.6 mm thinner and 422 g lighter than the Canon EOS 40D.
| Canon EOS 40D | Olympus OM-D E-M5 | |
|---|---|---|
| Size (W × H × D) | 145.5 × 107.8 × 73.5 mm | 121 × 89.6 × 41.9 mm |
| Weight | 822 g | 400 g |
| Lens | Canon EF | Micro Four Thirds |
| Sensor | APS-C | Four Thirds |
| Announced | 2007 | 2012 |