Sony A6700 has a
26.0MP APS-C (23.5 x 15.6 mm ) sized BSI-CMOS sensor and features Bionz XR processor. On the other hand, Sony A6400 has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz X processor.
Below you can see the A6700 and A6400 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A6700 and Sony A6400 Cameras
Sony A6700 and Sony A6400 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 Sony A6400 has 8% larger pixel area (15.28µm 2 vs 14.10µm 2 ) compared to Sony A6700, 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
Sony A6700
or the
Sony A6400 ,
including hyperfocal distance.
