Ricoh WG-50 has a
16.0MP (1/2. ) sized BSI-CMOS sensor . On the other hand, Pentax W80 has a
12.0MP 1/2.3-inch (6.08 x 4.56 mm ) sized CCD sensor .
Below you can see the WG-50 and W80 sensor size comparison.
As seen above, Pentax W80 has a infx Larger sensor area than Ricoh WG-50. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.