Both Sony H400 and Canon SX620 HS have 20.0 MP resolution sensors but Sony H400's sensor is 1/2.3-inch (6.17 x 4.55 mm ) and Canon SX620 HS's sensor is 1/2.3 (6.17 x 4.55 mm ).
Since Canon SX620 HS's has a larger sensor area with the same resolution, this means that it also has a larger pixel area hence better light collecting capacity for a given aperture compared to Sony H400.
Below you can see the H400 and SX620 HS sensor size comparison.
Sensor Size and Resolution Comparison image of Sony H400 and Canon SX620 HS Cameras
Sony H400 and Canon SX620 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
Sony H400
or the
Canon SX620 HS ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/2.3-inch versus 1/2.3),
so compare them at the same framing rather than the same focal length.
Put the same focal length on the smaller sensor and it will show less depth of
field, not more, because it also crops tighter. The calculator shows the
full frame equivalent focal length for each body so you can match the framing.
