Not For Resale – Free Download at http://www.joe-chan.com/manuals
MChanging Lenses
One of the nice features of an SLR is its lens interchangeability. An SLR is not really a SINGLE LENS reflex at all, because it can use many lenses of various focal lengths. In the design of an SLR, the type of lens mount and its construction are very important factors. The EF camera uses the Canon Breech-Lock Mount first developed in 1959. This unique mount combines the virtues of sturdiness, rugged dependability and fast operation. The mount holds the lens securely in place with absolutely no wobble or play and insures that the lens is always exactly the same distance from the film plane. Changing lenses is a rapid procedure requiring a little more than one-eight of a turn of the breech-lock ring on the back of the lens. To remove the lens from the camera, turn the breech-lock ring counter-clockwise until it stops and pull the lens away from the camera body. Mounting another lens on the camera body is a simply procedure. Just align the red dot on the breech-lock ring of the lens with the red dot located under the name "Canon" engraved on the front of the camera's pentaprism. Push the back of the lens into the camera body and turn the breech-lock ring clockwise until it is tight.