The optics of the EF 90-300mm f/4.5-5.6 USM are based on those of the EF 75-300mm f/4-5.6 III USM and the optical performance is similar. However, the AFdrive pattern has been optimized for the EOS 300V, giving a faster AF speed. Thecommunication speed between the lens and the camera is faster due to a new high-speed CPU. 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. This lens features a micro USM (Ultrasonic Motor) motor which operates almost noiseless

  • 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
  • Environmentally-friendly lead-free glass used


Focal Length

300mm, 90mm

Focus Type


Minimum Aperture