Nikon S4000 has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor and features Expeed C2 processor. On the other hand, Canon ELPH 340 HS has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CMOS sensor and features DIGIC 4+ processor.
Below you can see the S4000 and ELPH 340 HS sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon S4000 and Canon ELPH 340 HS Cameras
Nikon S4000 and Canon ELPH 340 HS 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 S4000 has 32% larger pixel area compared to Canon ELPH 340 HS, it has potential to collect more light on pixel level hence 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 S4000
or the
Canon ELPH 340 HS ,
including hyperfocal distance.
