The Olympus E-3 is 40.5 mm wider, 58.5 mm taller, 41 mm deeper and 690 g heavier than the Pentax Q7.
| Pentax Q7 | Olympus E-3 | |
|---|---|---|
| Size (W × H × D) | 102 × 58 × 33.5 mm | 142.5 × 116.5 × 74.5 mm |
| Weight | 200 g | 890 g |
| Lens | Pentax Q | Four Thirds |
| Sensor | 1/1.7" | Four Thirds |
| Announced | 2013 | 2007 |