Both Pentax X70 and Fujifilm XQ1 have 12.0 MP resolution sensors but Pentax X70's sensor is 1/2.3-inch (6.17 x 4.55 mm ) and Fujifilm XQ1's sensor is 2/3-inch (8.8 x 6.6 mm ).
Since Fujifilm XQ1'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 Pentax X70.
Below you can see the X70 and XQ1 sensor size comparison.
Sensor Size and Resolution Comparison image of Pentax X70 and Fujifilm XQ1 Cameras
As seen above, Fujifilm XQ1 has a 2.1x Larger sensor area than Pentax X70. Larger sensors give photographer more control on the depth of field and blurry background compared to smaller sensor when shot in 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 X70
or the
Fujifilm XQ1 ,
including hyperfocal distance.
One thing to watch when comparing these two: they have different sensor sizes
(1/2.3-inch versus 2/3-inch),
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.
