Why do the default focal length camera lenses on phones gather the most light?



Nowadays we have phones with multiple cameras on them, usually for different lenses. The standard is to have a ‘standard’ lens, a wide-angle one and a zoom lens. Yet usually the standard, middle ground one is the best at taking pictures. This is especially noticeable at night when, on the same settings, the default camera will pick up more light than the other cameras.

Why would the ‘standard’ lens gather more light than, say, the wide angle one?

In: Technology

It always boils down to sensor size and optics construction.

Phone/camera makers simply assume that the middle lens will get the most use in everyday life, and give that one the best design for the best quality.

The other ones have some compromises that are largely a result of cost savings since they’ll be used less.