Ricoh GR IV Monochrome has a
26.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor . On the other hand, Ricoh GR IIIx has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor .
Another similarity between these two cameras is that both Ricoh GR IIIx and Ricoh GR IV Monochrome sensors lack anti-alias (Low-Pass) filters. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the GR IV Monochrome and GR IIIx sensor size comparison.
Sensor Size and Resolution Comparison image of Ricoh GR IV Monochrome and Ricoh GR IIIx Cameras
Ricoh GR IV Monochrome and Ricoh GR IIIx 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 IIIx has 6% larger pixel area (15.28µm 2 vs 14.35µm 2 ) compared to Ricoh GR IV Monochrome, 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
Ricoh GR IV Monochrome
or the
Ricoh GR IIIx ,
including hyperfocal distance.
