Both FujiFilm S1600 and Nikon D3S have 12.0 MP resolution sensors but FujiFilm S1600's sensor is 1/2.3-inch (6.17 x 4.55 mm ) and Nikon D3S's sensor is Full frame (36 x 23.9 mm ).
Since Nikon D3S'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 FujiFilm S1600.
Below you can see the S1600 and D3S sensor size comparison.
Sensor Size and Resolution Comparison image of FujiFilm S1600 and Nikon D3S Cameras
As seen above, Nikon D3S has a 30.7x Larger sensor area than FujiFilm S1600. 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.
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 S1600
or the
Nikon D3S ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/2.3-inch versus Full frame),
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.
