canon ef 70-300mm f 4-5 .6 is usm lens for canon eos slr cameras
featuring the latest 3-stop image stabilizer for outstanding camera shake reduction the ef 70-300mm f4-5 .6 is usm zoom lens also features super responsive autofocus . replacing the popular ef 75-300mm f4-5 .6 is usm the world s first interchangeable lens with image stabilizer is the lens is expected to appeal to serious amateur nature and sports photographers looking to achieve outstanding results while shooting hand held . image stabilizer is dramatically reduces image blur caused by camera shake . the ef 70-300mm f4-5 .6 is usm features canon s latest 3-stop is a one-stop improvement over its predecessor . this allows shutter speeds up to three stops slower than would otherwise be possible with no perceptible increase in image blur . photographers normally shooting a 300mm frame handheld at 1 500 second can obtain the equivalent result with a shutter speed of just 1 60 second vastly extending options in low-light conditions . gyro sensors detect unwanted vibrations triggering the corresponding movement of a correcting lens group perpendicular to the optical axis . this alters the light path returning the image to its correct position on the sensor or film plane . the ef 70-300mm f4-5 .6 is usm provides 2-mode is for shooting immobile subjects . mode 1 stabilizes the image along both the horizontal and vertical axes . for shooting while panning to follow a moving subject mode 2 turns off correction in the panned direction and prevents the effect of dragging the subject back through the frame . is switches off automatically when the camera is mounted on a tripod thus preventing feedback loops between the is sensor and stabilizer motor vibrations . superb autofocus the micro usm motor found in the ef 70-300mm f4-5 .6 is usm employs ultra-sonic frequency vibrations to drive auto focus with unrivalled speed and near-silent operation . good holding torque stops the lens with precision and accuracy the instant it arrives at the correct focus point and without overshoot . a high-speed cpu and optimised af algorithm result in a significant increase of af speed compared to that of its predecessor . a zoom ring locking mechanism is provided that locks the zoom at the wide-angle setting . this ensures that the lens is carried or stored in its most compact position preventing possible damage caused by the lens extending and hitting obstacles when being carried mounted on a camera with a strap . pleasing defocused background the ef 70-300mm f4-5 .6 is usm employs an electro-magnetic diaphragm emd with a circular aperture . this helps create an attractive even defocused background when isolating a subject at large apertures . image quality by optimizing super spectra lens coatings and lens element shaping canon s engineers have been effective in suppressing flare and ghosting -- more prone to occur with digital cameras due to reflection off the image sensor . by increasing light absorption coatings reduce reflections off lens element surfaces to deliver crisp undistorted images with natural color balance . focal length translates to 112-480mm equivalent in 35mm film format when fitted to eos 20d and eos 350d cameras . the eos system the ef 70-300mm f4-5 .6 is usm includes distance metering information providing compatibility with the e-ttl ii flash system of late model cameras such as the eos-1d mark ii n and eos 5d . when used in conjunction with canon s range of ex speedlite flash units the lens passes distance information to the flash algorithm for markedly improved flash exposure metering . accessories for the ef 70-300mm f4-5 .6 is usm include the lens hood et-65b and the lens pouch lp1222 . in keeping with canon s kyosei philosophy of living in harmony with the environment the lens features only lead-free glass .