Both Olympus TG-830 iHS and Ricoh GR have 16.0 MP resolution sensors but Olympus TG-830 iHS's sensor is 1/2.3-inch (6.17 x 4.55 mm ) and Ricoh GR's sensor is APS-C (23.7 x 15.7 mm ).
Since Ricoh GR's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Olympus TG-830 iHS.
Below you can see the TG-830 iHS and GR sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus TG-830 iHS and Ricoh GR Cameras
As seen above, Ricoh GR has a 13.3x Larger sensor area than Olympus TG-830 iHS. 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.
Sensor size sets the circle of confusion, so it drives how much depth of field each
of these bodies gives you at a given aperture. You can calculate it exactly for the
Olympus TG-830 iHS
or the
Ricoh GR ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/2.3-inch versus APS-C),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.
