Fujifilm A170 has a
10.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CCD sensor . On the other hand, Olympus TG-830 iHS has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CMOS sensor .
Olympus TG-830 iHS's sensor provides 6MP more than Fujifilm A170'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 A170 and TG-830 iHS sensor size comparison.
Sensor Size and Resolution Comparison image of Fujifilm A170 and Olympus TG-830 iHS Cameras
Fujifilm A170 and Olympus TG-830 iHS 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 Fujifilm A170 has 58% larger pixel area compared to Olympus TG-830 iHS, 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
Fujifilm A170
or the
Olympus TG-830 iHS ,
including hyperfocal distance.
