Sony A68 has a
24.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz X processor. On the other hand, Nikon D70 has a
6.0MP APS-C (23.7 x 15.5 mm ) sized CCD sensor .
Sony A68's sensor provides 18MP more than Nikon D70'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 A68 and D70 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A68 and Nikon D70 Cameras
Sony A68 and Nikon D70 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 Sony A68 and Nikon D70 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, A68 has scored 79, 29 points higher than D70.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A68
79
24.1 bits
13.5 Evs
701 ISO
Nikon D70
50
20.4 bits
10.3 Evs
529 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
Sony A68
or the
Nikon D70 ,
including hyperfocal distance.
