Ricoh GXR GR Lens A12 28mm has a
12.0MP APS-C (23.6 x 15.7 mm ) sized CMOS sensor and features GR Engine III processor. On the other hand, Fujifilm X100T has a
16.0MP APS-C (23.6 x 15.8 mm ) sized CMOS X-TRANS II sensor and features EXR Processor II processor.
Below you can see the GXR GR Lens A12 28mm F2.5 and X100T sensor size comparison.
Sensor Size and Resolution Comparison image of Ricoh GXR GR Lens A12 28mm and Fujifilm X100T Cameras
Ricoh GXR GR Lens A12 28mm and Fujifilm X100T 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
Ricoh GXR GR Lens A12 28mm
or the
Fujifilm X100T ,
including hyperfocal distance.