Nikon P7800 has a
12.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized BSI-CMOS sensor . On the other hand, Ricoh GR Digital IV has a
10.0MP 1/1.7-inch (7.44 x 5.58 mm ) sized CCD sensor .
Below you can see the P7800 and GR Digital IV sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon P7800 and Ricoh GR Digital IV Cameras
Nikon P7800 and Ricoh GR Digital IV 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 GR Digital IV has 20% larger pixel area (4.16µm 2 vs 3.46µm 2 ) compared to Nikon P7800, 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
Nikon P7800
or the
Ricoh GR Digital IV ,
including hyperfocal distance.
