Nikon AF-S FX NIKKOR 300mm f/4D IF-ED Fixed Zoom Lens with Auto Focus for Nikon DSLR Cameras International Version

Lens-making is an art--Nikon artisans craft Nikkor optics from the finest materials, taking pride in adding their intellect and technique to bring the world's finest lenses to life. They push the leading edge of lens-making in their effort to provide the "glass" that makes the world's greatest pictures. AF Nikkor lenses work with Nikon SLRs for optimal performance, even the very latest. The Nikon 300mm f4D IF-ED AF-S is a compact super-telephoto lens for travel, sports, wildlife and stock photography. It is a super fast, super quiet lens using Silent Wave motor technology, with ED glass elements for high-resolution and high-contrast images.

It features a 4.8 -foot closest focusing distance, M/A mode that allows rapid switching between autofocus and manual operation, and a nine-blade rounded diaphragm that achieves a natural blur for out-of-focus elements.
ED glass: An essential element of Nikkor telephoto lenses Nikon developed ED (Extra-low Dispersion) glass to enable the production of lenses that offer superior sharpness and color correction by minimizing chromatic aberration. Put simply, chromatic aberration is a type of image and color dispersion that occurs when light rays of varying wavelengths pass through optical glass. In the past, correcting this problem for telephoto lenses required special optical elements that offer anomalous dispersion characteristics--specifically calcium fluoride crystals. However, fluorite easily cracks and is sensitive to temperature changes that can adversely affect focusing by altering the lens' refractive index. So Nikon designers and engineers put their heads together and came up with ED glass, which offers all the benefits and none of the drawbacks of calcium fluorite-based glass. With this innovation, Nikon developed several types of ED glass suitable for various lenses. They deliver stunning sharpness and contrast even at their largest apertures. In this way, Nikkor's ED-series lenses exemplify Nikon's preeminence in lens