Nikon D90 has a
12.0MP APS-C (23.6 x 15.8 mm ) sized CMOS sensor . On the other hand, Fujifilm S5 Pro has a
6.0MP APS-C (23 x 15.5 mm ) sized CCD sensor .
Nikon D90's sensor provides 6MP more than Fujifilm S5 Pro's sensor, which gives a significant advantage in real life. You can print your images larger or crop more freely.
On the other hand, please keep in mind that Max sensor resolution is not the only determinant of resolving power. Factors such as the optical elements, low pass filter, pixel size and sensor technology also affects the final resolution of the captured image.
Below you can see the D90 and S5 Pro sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D90 and Fujifilm S5 Pro Cameras
Nikon D90 and Fujifilm S5 Pro have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the same focal length and aperture.
DxOMark Sensor Scores
Both Nikon D90 and Fujifilm S5 Pro 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, D90 has scored 73, 8 points higher than S5 Pro.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Nikon D90
73
22.7 bits
12.5 Evs
977 ISO
Fujifilm S5 Pro
65
21.6 bits
13.5 Evs
448 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
Nikon D90
or the
Fujifilm S5 Pro ,
including hyperfocal distance.