Sony A330 has a
10.0MP APS-C (23.5 x 15.7 mm ) sized CCD sensor and features Bionz processor. On the other hand, Samsung NX30 has a
20.0MP APS-C (23.5 x 15.7 mm ) sized CMOS sensor and features DRIMeIV processor.
Samsung NX30's sensor provides 10MP 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.
Below you can see the A330 and NX30 sensor size comparison.
Sensor Size and Resolution Comparison image of Sony A330 and Samsung NX30 Cameras
Sony A330 and Samsung NX30 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 98% larger pixel area compared to Samsung NX30, it has potential to collect more light on pixel level hence have less noise in low light / High ISO images.
DxOMark Sensor Scores
DxOMark is a benchmark that scientifically assesses image quality of camera sensors. It 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. Sony A330 and Samsung NX30 sensors have been tested by DxO and the results show that NX30 has a better overall score of 77, 13 points higher compared to A330's score of 64.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Sony A330
64
22.4 bits
11.5 Evs
535 ISO
Samsung NX30
77
23.5 bits
12.4 Evs
1014 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 A330
or the
Samsung NX30 ,
including hyperfocal distance.
