Overview

The Canon EF 28-105mm f/4.0-5.6 USM is a budget zoom lens with cheap build quality, including a plastic mount and no distance window. Optically, it is soft wide open at all focal lengths, requiring f/6.3 or f/8 for decent sharpness, with noticeable barrel distortion at wide angles and poor 0.19x magnification. It uses a Micro-USM motor without full-time manual focus. The lens is light and small, but Ken Rockwell advises avoiding it due to its slow aperture and lack of manual-focus override. It suits users on a tight budget who prioritize reach over image quality.