Canon RF15-30mm F4.5-6.3 IS STM Instruction Manual - Page 9

Focusing/control ring Use as a Control Ring Set the focusing/control selector switch to CONTROL. Set the control ring function using the camera's menu. The control ring can be assigned the functions that are commonly used with cameras, such as shutter speed and aperture settings. Please refer to the camera's instructions for details on how to use the control ring. z The lens' focusing ring (focusing/control ring) is electronic. z With a camera capable of electronic full-time manual focus, manual focusing is possible in both One-Shot AF and Servo AF modes. However, the camera settings need to be changed. z When AF operation is set to One-Shot AF, manual focus is possible after autofocusing has been completed by continuing to press the shutter button halfway (electronic manual focus function). However, the camera settings need to be changed. z When movie recording, the AF speed will be slower than the still photo shooting mode. It is possible to adjust the AF speed on the camera by setting Movie Servo AF to [Enable]. Please refer to the camera's instructions for details. ENG-8