The Pentax K-7 is 5.5 mm taller, 20.7 mm deeper and 313 g heavier than the Olympus E-420, and as wide.
| Olympus E-420 | Pentax K-7 | |
|---|---|---|
| Size (W × H × D) | 129.5 × 91 × 53 mm | 129.5 × 96.5 × 73.7 mm |
| Weight | 445 g | 758 g |
| Lens | Four Thirds | Pentax K |
| Sensor | Four Thirds | — |
| Announced | 2008 | 2009 |