Canon EF

Canon EF ... standard zoom lens for the EOS 300X. It is among the lenses with the fastest AF speed in its class when used with this camera. To achieve this increased speed the EF 28-90mm f/4-5.6 III uses an AF drive pattern optimised for the EOS 300X and features a new AF algorithm. The exterior design of the lens matches that of the EOS 300X and other EOS models. High image quality is ensured throughout the focal length range by the use of an aspherical element in one of the lens groups. Only environmentally friendly lead-free glass is used for the optics. This lens also includes distance-metering information that provides compatibility with the E-TTL II flash system.