Canon EF 100mm f/2.8 Macro USM - Canon EF Mount

The Canon EF 100mm f/2.8 Macro USM is a significant update over the original model, introducing an Ultrasonic Motor for fast, quiet autofocus and full-time manual focus override. It provides life-size 1:1 magnification without the need for extension tubes. This lens is highly regarded for its optical clarity and serves as a dual-purpose tool for detailed close-up work and flattering headshot photography. When inspecting a used USM model, the focus limiter switch and the AF/MF toggle should click firmly into place. SDS checks the internal USM motor to ensure it operates silently and does not hunt excessively. As a macro lens often used at small apertures, the internal glass must be free of significant dust and fungal growth. The barrel should show no signs of excessive play, and the mount should be clean and secure.