The EF 70-300mm lens is a telephoto zoom lens made by Canon Inc. The lens has an EF mount to work with the EOS line of cameras. Three Canon EF telephoto zoom lenses carry the 70-300mm designation. These are the EF 70-300mm f/4.5-5.6 DO IS USM, EF 70-300mm f/4-5.6L IS USM and the EF 70-300mm f/4-5.6 IS USM. All versions offer IS and USM and have nearly the same maximum aperture of 4/4.5 to 5.6 over their entire focal range. The optics of the Canon EF 70–300mm f/4–5.6 L USM lens include 19 elements in 14 groups, two of which are ultra-low dispersion glass. Wikipedia [ - ]

The EF 70-300mm lens is a telephoto zoom lens made by Canon Inc. The lens has an EF mount to... [ + ]