Both Panasonic FX90 and GoPro Hero8 Black have 1/2.3-inch sized 12.0 MP resolution sensors so sensor size and resolution is not a differentiator between these two cameras.
Below you can see the FX90 and Hero8 Black sensor size comparison.
Sensor Size and Resolution Comparison image of Panasonic FX90 and GoPro Hero8 Black Cameras
Panasonic FX90 and GoPro Hero8 Black have almost the same sensor size, so neither of them has any significant advantage over the other in terms of providing control over depth of field when used with the 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
Panasonic FX90
or the
GoPro Hero8 Black ,
including hyperfocal distance.
