The Olympus PEN E-PL1 is 7.9 mm narrower, 19.3 mm shorter, 26 mm thinner and 247 g lighter than the Pentax K-x.
| Pentax K-x | Olympus PEN E-PL1 | |
|---|---|---|
| Size (W × H × D) | 122.5 × 91.5 × 67.5 mm | 114.6 × 72.2 × 41.5 mm |
| Weight | 581 g | 334 g |
| Lens | Pentax K | Micro Four Thirds |
| Sensor | — | Four Thirds |
| Announced | 2009 | 2010 |