The Olympus PEN E-P3 is 9 mm narrower, 27.9 mm shorter, 38.2 mm thinner and 391 g lighter than the Pentax K-5 II.
| Pentax K-5 II | Olympus PEN E-P3 | |
|---|---|---|
| Size (W × H × D) | 131 × 97 × 72.5 mm | 122 × 69.1 × 34.3 mm |
| Weight | 760 g | 369 g |
| Lens | Pentax K | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2012 | 2011 |