Sony A37 has a
16.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor . On the other hand, Sony A33 has a
14.0MP APS-C (23.5 x 15.6 mm ) sized CMOS sensor and features Bionz processor.
Below you can see the A37 and A33 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A37 and Sony A33 Cameras
Sony A37 and Sony A33 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 A33 has 14% larger pixel area (26.13µm 2 vs 22.87µm 2 ) compared to Sony A37, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
DxOMark Sensor Scores
Both Sony A37 and Sony A33 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, A37 has scored 75, 5 points higher than A33.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A37
75
23.3 bits
12.9 Evs
799 ISO
Sony A33
70
22.8 bits
12.6 Evs
591 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 A37
or the
Sony A33 ,
including hyperfocal distance.
