Canon telephoto Zoom Lens EF 100-400 mm F4.5-5.6L USM Full Size Support

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Features: EF 100-400 4 5-5 6L USM IS OBJECTIVE ZOOM SW (NMS) Details: Zoom lenses are very convenient. The equivalent of two or more fixed focal length lenses in one unit. The maximum aperture of some zoom lenses changes as you alter the focal length, but through-the-lens (TTL) metering takes this into account to give correct exposure.Canon offers this first EF telephoto zoom lens with a high-magnification zoom range of 100 to 400mm. This is the first L type zoom lens with IS (Image Stabilizer)