Pentax Q-S1 has a
12.0MP 1/1.7 (7.44 x 5.58 mm ) sized BSI-CMOS sensor and features Q Engine processor. On the other hand, Ricoh GXR S10 24-72mm has a
10.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CCD sensor and features Smooth Imaging Engine IV processor.
Below you can see the Q-S1 and GXR S10 24-72mm F2.5-4.4 VC sensor size comparison.
Sensor Size and Resolution Comparison image of Pentax Q-S1 and Ricoh GXR S10 24-72mm Cameras
Pentax Q-S1 and Ricoh GXR S10 24-72mm have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Ricoh GXR S10 24-72mm has 20% larger pixel area (4.16µm 2 vs 3.46µm 2 ) compared to Pentax Q-S1, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
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
Pentax Q-S1
or the
Ricoh GXR S10 24-72mm ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/1.7 versus 1/1.7-inch),
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.
