The lens has an EF-type mount, which fits the Canon EOS line of cameras.
When used on a digitalEOS body with a field of view compensation factor of 1.3x, such as the Canon EOS-1D Mark III, it provides a narrow field of view, equivalent to a 36–390mm lens mounted on a 35mm frame body. With a 1.6x body such as the Canon EOS 400D, it provides a narrower field of view, equivalent to a 45–480mm lens mounted on a 35mm frame body.[1]
This lens has a push-pull type zoom mechanism[2] and can be used for many types of photography, because of its large focal length range. It is used mostly for press photography, and also for travel photography.[3][4]