Fujifilm X-Pro3 has a
26.0MP APS-C (23.5 x 15.6 mm ) sized BSI-CMOS sensor and features X-Processor 4 processor. On the other hand, Sigma Quattro has a
29.0MP APS-C (23.5 x 15.6 mm ) sized CMOS (Foveon X3) sensor and features Dual TRUE III processor.
Another similarity between these two cameras is that both Sigma Quattro and Fujifilm X-Pro3 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 X-Pro3 and Quattro sensor size comparison.
Sensor Size and Resolution Comparison image of Fujifilm X-Pro3 and Sigma Quattro Cameras
Fujifilm X-Pro3 and Sigma Quattro 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 Sigma Quattro has 32% larger pixel area (18.69µm 2 vs 14.12µm 2 ) compared to Fujifilm X-Pro3, 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
Fujifilm X-Pro3
or the
Sigma Quattro ,
including hyperfocal distance.
