Canon SX40 HS has a
12.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized BSI-CMOS sensor . On the other hand, Panasonic FZ70 has a
16.0MP 1/2.3-inch (6.17 x 4.55 mm ) sized CMOS sensor and features Venus Engine processor.
Below you can see the SX40 HS and FZ70 sensor size comparison.
Sensor Size and Resolution Comparison image of Canon SX40 HS and Panasonic FZ70 Cameras
Canon SX40 HS and Panasonic FZ70 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 Canon SX40 HS has 32% larger pixel area compared to Panasonic FZ70, 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
Canon SX40 HS
or the
Panasonic FZ70 ,
including hyperfocal distance.
