The Pentax Q-S1 is 5.5 mm narrower, 5.7 mm shorter, 4.2 mm thinner and 125 g lighter than the Olympus PEN E-PL5.
| Olympus PEN E-PL5 | Pentax Q-S1 | |
|---|---|---|
| Size (W × H × D) | 110.5 × 63.7 × 38.2 mm | 105 × 58 × 34 mm |
| Weight | 325 g | 200 g |
| Lens | Micro Four Thirds | Pentax Q |
| Sensor | Four Thirds | 1/1.7" |
| Announced | 2012 | 2014 |