Sony A6100 has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz X processor. On the other hand, Sony A3000 has a
20.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features BIONZ processor.
Below you can see the A6100 and A3000 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A6100 and Sony A3000 Cameras
Sony A6100 and Sony A3000 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 A3000 has 21% larger pixel area (18.50µm 2 vs 15.28µm 2 ) compared to Sony A6100, 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 A6100
or the
Sony A3000 ,
including hyperfocal distance.
