Both Nikon D60 and Ricoh GXR S10 24-72mm have 10.0 MP resolution sensors but Nikon D60's sensor is APS-C (23.6 x 15.8 mm ) and Ricoh GXR S10 24-72mm's sensor is 1/1.7-inch (7.44 x 5.58 mm ).
Since Nikon D60'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 Ricoh GXR S10 24-72mm.
Below you can see the D60 and GXR S10 24-72mm F2.5-4.4 VC sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D60 and Ricoh GXR S10 24-72mm Cameras
As seen above, Nikon D60 has a 9.0x Larger sensor area than Ricoh GXR S10 24-72mm. 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
Nikon D60
or the
Ricoh GXR S10 24-72mm ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(APS-C 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.