Both Nikon D5000 and FujiFilm S2500HD have 12.0 MP resolution sensors but Nikon D5000's sensor is APS-C (23.6 x 15.8 mm ) and FujiFilm S2500HD's sensor is 1/2.3-inch (6.17 x 4.55 mm ).
Since Nikon D5000'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 S2500HD.
Below you can see the D5000 and S2500HD sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D5000 and FujiFilm S2500HD Cameras
As seen above, Nikon D5000 has a 13.3x Larger sensor area than FujiFilm S2500HD. 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
Nikon D5000
or the
FujiFilm S2500HD ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(APS-C versus 1/2.3-inch),
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.
