28 millimeters is an extremely versatile focal length that can be useful in
a wide variety of situations on both full frame and APS-C format cameras.
On a 35mm full frame format camera, 28mm is wide enough to allow
comfortable shooting indoors or on the street without producing forced
perspective. On an APS-C format camera 28mm is equivalent to a focal
length of 42mm, which is close to “normal” in terms of angle-of-view and
perspective. For photo enthusiasts who use either or both types of bodies,
this lens is a must-have! It’s compact and lightweight, and is a versatile,
convenient choice for use either as a main or second lens.