The Canon RF 24-105mm f/4-7.1 IS STM is a well-rounded zoom covering wide-angle to short telephoto focal lengths to benefit working in a wide variety of conditions. A variable maximum aperture also helps to maintain an impressively compact profile to suit everyday shooting needs. Also, an STM motor affords impressively quiet and smooth autofocus performance and full-time manual focus override. Additionally, a configurable Control Ring lets you adjust exposure settings, including ISO, aperture, and exposure compensation, from the lens itself. STM stepping motor offers fast, quiet, smooth, and accurate autofocus performance that is ideal for video recording as well as still shooting. Configurable Control Ring can be used to adjust a variety of exposure settings, including aperture, ISO, and exposure compensation.