Check the AF/MF switch on the camera body. These lenses lack an AF/MF switch. The body AF/MF switch is located to the right of the hand grip when looking at the front of the camera.
-Demetrius
Bodies: EOS 40D & EOS 5D Mark IV
Lenses: EF Holy Trinity, EF 50mm F/1.8 STM, EF 70-210mm F/4 & EF 85mm F/1.8 USM
Speedlites: 420EX, 470EX-AI, 550EX & 600EX II-RT
