This super-telephoto lens offers a focal length of approx. 859mm in the 35mm format. The multi-layer HD (High Definition) coating offers higher light transmittance with reduced reflection to deliver sharp, clear images free of flare and ghost images, even under demanding lighting conditions such as backlight. Its dustproof, weather-resistant construction assures reliable operation in demanding outdoor settings. It Incorporates smooth autofocus operation using an AF driving motor (DC motor) installed inside the lens barrel*. SP (Super Protect) coating is applied to the front surface of this lens to effectively repel water and grease, and for easy wipe-off of dust. Includes a built-in, removable filter holder in the barrel.