The Olympus OM-D E-M5 is 1.5 mm narrower, 1.4 mm shorter, 30.6 mm thinner and 278 g lighter than the Pentax K-S2.
| Pentax K-S2 | Olympus OM-D E-M5 | |
|---|---|---|
| Size (W × H × D) | 122.5 × 91 × 72.5 mm | 121 × 89.6 × 41.9 mm |
| Weight | 678 g | 400 g |
| Lens | Pentax K | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2015 | 2012 |