When using the zone focus or the wide-tracking focus, the display EVF or OVF shows multiple points that are supposed to be in focus. Why all these points?

In any of the area focus modes, the zone or the wide-tracking, the camera decides where to focus. Where to focus will depend on the which Fuji camera and which version of the firmware:

• The older cameras and the older firmware will …

In the “good old days” all the digital cameras were using CCD (Charge Coupled Device) sensors and now almost all digital cameras use CMOS (Complementary Metal Oxide Semiconductor) sensors. CMOS image sensors are so much cheaper to manufacture and they behave better (more linear) in less than perfect conditions.

The way the sensor works (extremely simplified) is they receive the light from the photosite (a small lens that is front …