Both Nikon D2Xs and Samsung SL620 have 12.0 MP resolution sensors but Nikon D2Xs's sensor is APS-C (23.7 x 15.7 mm ) and Samsung SL620's sensor is 1/2.3-inch (6.08 x 4.56 mm ).
Since Nikon D2Xs'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 Samsung SL620.
Below you can see the D2Xs and SL620 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D2Xs and Samsung SL620 Cameras
As seen above, Nikon D2Xs has a 13.4x Larger sensor area than Samsung SL620. 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 D2Xs
or the
Samsung SL620 ,
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.
