Pentax XG-1 has a
16.0MP 1/2.3 (6.17 x 4.55 mm ) sized BSI-CMOS sensor . On the other hand, Canon SX720 HS has a
20.3MP 1/2.3 (6.17 x 4.55 mm ) sized BSI-CMOS sensor and features DIGIC 6 processor.
Canon SX720 HS's sensor provides 4.3MP more than Pentax XG-1'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 XG-1 and SX720 HS sensor size comparison.
Sensor Size and Resolution Comparison image of Pentax XG-1 and Canon SX720 HS Cameras
Pentax XG-1 and Canon SX720 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.
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
Pentax XG-1
or the
Canon SX720 HS ,
including hyperfocal distance.
