Overview

The Canon EF 75-300mm f/4.0-5.6 III USM is an affordable telephoto zoom lens. Optically, it offers decent center sharpness at shorter focal lengths but suffers from softness and chromatic aberration at the long end, especially wide open (OpticalLimits). Build quality is basic with a plastic mount and non-rotating front element, but the USM autofocus is fast and quiet. Handling is lightweight and compact, though the zoom ring is stiff. It suits budget-conscious beginners or those needing occasional telephoto reach without high expectations for image quality (OpticalLimits).