CANON EF 70-300MM F/4.5-5.6 IS USM
TWO MODE OPTICAL IMAGE STABILIZATION, 2 ULTRA LOW DISPERSION LENS ELEMENTS, APERTURE RANGE: F/4-45, ULTRASONIC AUTOFOCUS MOTOR.
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Availability date: 04/07/2014
The EF70-300mm f/4.5-5.6 DO IS USM features a zoom ring locking mechanism, locking the lens at its shortest total length. This helps to protect the lens from potential damage by preventing the zoom elements extending under their own weight. This might otherwise occur when the lens is mounted to a camera that hangs from a neck or shoulder strap.
The lens incorporates Canon`s renowned Image Stabilisation (IS) technology, compensating for approximately three stops without any perceptible increase in image blur when shooting static subjects or panning. This vastly increases the range of circumstances in which hand-held photography is possible, limiting the need to carry a tripod. During major movement in a single direction, IS Mode 2 technology automatically determines that the movement is conscious panning and halts correction in the relevant direction, thereby preventing shake-return. The IS system automatically detects lack of movement / vibration to prevent operation errors when a tripod is in use. IS efficacy increases and lower overall size have been achieved through improvements in the moving contact sections of the IS lens barrel, the IS lens group barrel locking mechanism and the shake-detection gyro.
A rear focusing ring type USM, high-speed CPU and new AF algorithms combine to give the lens extremely fast auto-focusing. The ring-type ultrasonic motor (USM) converts ultrasonic vibrational energy into rotational force to deliver high-speed, high-precision, super efficient and virtually noiseless auto focusing, with good holding torque for rapid response and accurate stopping. Full-time manual override is featured, removing the possibility of damage to the autofocus mechanism during manual focus. The lens has a minimum focusing distance of just 1.4m throughout the entire zoom range.
Ideal for digital
Lens shape has been optimised and new coatings added to suppress ghosting and flaring. This makes the lens ideal for use with digital cameras that are more susceptible to reflections off the recording media than are film cameras. When fitted to digital cameras with an APS-C size sensor such as the EOS 10D, the lens will have an equivalent focal length range of 112 480mm in the 35mm format.
Appropriate refractive and DO elements are combined to realise low distortion, high corner-to-corner resolution throughout the entire zoom range. As with all EF lenses, aperture is controlled with an EMD (electromagnetic diaphragm) for fast, quiet, highly precise control and the lens incorporates a near circular aperture diaphragm for beautifully pleasing background blur.
Working with EOS
The drive pattern of the lens is tailored to specifically match that of the latest EOS range, extracting maximum benefit from the lens speed advantage. The lens comes with a case LP1116 and an exclusive hood ET-65B for shading against unwanted direct light. In harmony with the environment In keeping with Canon stringent environmental policy, only lead free glass is used in the lens optics.
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