Leica X2 has a
16.0MP APS-C (23.6 x 15.8 mm ) sized CMOS sensor . On the other hand, Ricoh GR III HDF has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor .
Ricoh GR III HDF's sensor provides 8MP more than Leica X2's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
One other difference between these two cameras that is worth mentioning is that Ricoh GR III HDF's sensor doesn't have an anti-alias (Low-Pass) filter. 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 X2 and GR III HDF sensor size comparison.
Sensor Size and Resolution Comparison image of Leica X2 and Ricoh GR III HDF Cameras
Leica X2 and Ricoh GR III HDF have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the 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
Leica X2
or the
Ricoh GR III HDF ,
including hyperfocal distance.
