Nikon S4300 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Nikon S3100 has a
14.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Expeed C2 processor.
Below you can see the S4300 and S3100 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon S4300 and Nikon S3100 Cameras
Nikon S4300 and Nikon S3100 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 Nikon S3100 has 14% larger pixel area (2.01µm 2 vs 1.76µm 2 ) compared to Nikon S4300, it has larger pixel area to collect light hence potential to have less noise in low light / High ISO images.
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 S4300
or the
Nikon S3100 ,
including hyperfocal distance.
