Olympus TG-870 has a
16.0MP (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features TruePic VII processor. On the other hand, OM System TG-7 has a
12.0MP (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features TruePic VIII processor.
Below you can see the TG-870 and TG-7 sensor size comparison.
Sensor Size and Resolution Comparison image of Olympus TG-870 and OM System TG-7 Cameras
Olympus TG-870 and OM System TG-7 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 OM System TG-7 has 32% larger pixel area (2.34µm 2 vs 1.76µm 2 ) compared to Olympus TG-870, 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
Olympus TG-870
or the
OM System TG-7 ,
including hyperfocal distance.
