Nikon AF-S FX NIKKOR F/4D IF-ED 300mm Fixed Zoom Lens with Auto Focus for Nikon DSLR Cameras Lens not zoomable Compact super-telephoto lens for travel, sports, wildlife, and stock photography Super-fast, super-quiet lens using Silent Wave motor technology ED glass elements for high-resolution and high-contrast images M/A mode allows rapid switching between autofocus and manual operation Nine-blade rounded diaphragm achieves a natural blur for out-of-focus elements