EF 90-300mm f/4.5-5.6

Features Compact size and low weight telephoto zoom lens One of the lenses with the fastest AF speed in its class Circular aperture at wide settings Exterior design matches the style of other EOS models Only environmentally-friendly lead-free glass used Allied with a standard zoom you will have most focal lengths you are likely to need The optics of the EF 90-300mm f/4.5-5.6 are based on those of the EF 75-300mm f/4-5.6 III and the optical performance is similar. However, the AF drive pattern has been optimized for the EOS 300V, giving a faster AF speed. Also, a new AF algorithm has been developed. All the lens elements are manufactured from environmentally-friendly lead-free glass. A redesigned electromagnetic diaphragm (EMD) provides an aperture which is nearly circular at the widest settings. This gives an improved out-of-focus background effect.