Both Nikon P340 and Nikon P7800 have 1/1.7-inch sized 12.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the P340 and P7800 sensor size comparison.
Sensor Size and Resolution Comparison image of Nikon P340 and Nikon P7800 Cameras
Nikon P340 and Nikon P7800 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.
DxOMark Sensor Scores
At Camera Decision, we also look at Dxo Mark sensors when available as we think it is a good indicator of image quality.
Model
Overall
Color Depth
Dynamic Range
Low-light ISO
Nikon P340
54
20.7 bits
11.9 Evs
273 ISO
Nikon P7800
54
21.2 bits
11.7 Evs
200 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
Nikon P340
or the
Nikon P7800 ,
including hyperfocal distance.
