Both Sony A7c and Sony A6300 have 24.0 MP resolution sensors but Sony A7c's sensor is Full frame (35.8 x 23.8 mm ) and Sony A6300's sensor is APS-C (23.5 x 15.6 mm ).
Since Sony A7c's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Sony A6300.
Below you can see the A7c and A6300 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A7c and Sony A6300 Cameras
As seen above, Sony A7c has a 2.3x Larger sensor area than Sony A6300. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in same focal length and aperture.
DxOMark Sensor Scores
Both Sony A7c and Sony A6300 sensors have been tested by DxoMark. DxoMark scores camera sensors for color depth (DXO Portrait), dynamic range (DXO Landscape) and low-light sensitivity (DXO Sports), and also gives them an overall score. Of the two cameras that we are comparing, A7c has scored 95, 10 points higher than A6300.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A7c
95
25.0 bits
14.7 Evs
3407 ISO
Sony A6300
85
24.4 bits
13.7 Evs
1437 ISO
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 A7c
or the
Sony A6300 ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(Full frame versus APS-C),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.
