EF70-200mm f/4L USM The ring USM (Ultrasonic Motor) and inner focusing system achieves high-speed silent autofocusing. Manual focusing, even while in AF mode, is possible thanks to full-time manual focusing mechanism. Extenders EF 1.4 X and 2X can be used with this lens, and the optional Ring Tripod Mount A (W) is being marketed concurrently.
Avoid direct sunlight when unloading the film Keep your exposed cartridges in a cool dray and shady place and have them processed as soon as possible Do not leave the same roll of film in your camera for months on end, since black and white film may become fogged and color film may experience a definite color-shift