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5
When using an EF lens, there will be a crop factor of 1.6x, so that the
apparent focal length of the lens will be 1.6x of the actual focal length.
With EF-S lenses, there is no apparent change in the focal length. All
camera functions will operate normally, including auto focus, auto
exposure, and touch-screen modes. A removable tripod mount collar
is included for use with longer lenses. When using a lens that’s heavier
than the camera, it is recommended that you use the tripod mount
collar to mount the camera on a tripod. Do not use the tripod mount
socket on the camera when using a telephoto lens. A heavy lens will
put excessive stress on the lens mount of the camera when the camera
is mounted to a tripod using the camera’s tripod mount socket.