Nikon D500 has a
21.0MP APS-C (23.5 x 15.7 mm ) sized CMOS sensor and features Expeed 5 processor. On the other hand, Sony A330 has a
10.0MP APS-C (23.5 x 15.7 mm ) sized CCD sensor and features Bionz processor.
Nikon D500's sensor provides 11MP more than Sony A330'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.
Another difference between these two cameras is that Nikon D500's sensor lacks anti-alias (Low-Pass) filter. Removing anti-alias filter increases the sharpness and level of detail but at the same time, it increases the chance of moiré occurring in certain scenes.
Below you can see the D500 and A330 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon D500 and Sony A330 Cameras
Nikon D500 and Sony A330 have the same sensor sizes so they will provide same level of control over the depth of field when used with same focal length and aperture. On the other hand, since Sony A330 has 105% larger pixel area (36.75µm 2 vs 17.85µm 2 ) compared to Nikon D500, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
DxOMark Sensor Scores
Both Nikon D500 and Sony A330 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, D500 has scored 84, 20 points higher than A330.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Nikon D500
84
24.1 bits
14.0 Evs
1324 ISO
Sony A330
64
22.4 bits
11.5 Evs
535 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 D500
or the
Sony A330 ,
including hyperfocal distance.
