Nikon 300mm f2.8G ED-IF VR is an Auto Focus (AF) Telephoto Prime lens with 35mm FF max sensor coverage. When mounted on a 35mm FF sensor camera, it will give you an FF equivalent focal range of 300mm. With a max aperture of f2.8, this is a fast lens.
This lens features on optical image stabilization which helps capturing sharper images at lower shutter speeds. Nikon 300mm f2.8G ED-IF VR is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body. Nikon 300mm f2.8G ED-IF VR was replaced with Nikon AF-S Nikkor 300mm f2.8G ED VR II. Follow the link to read our comparison of these cameras: Compare Nikon AF-S Nikkor 300mm f2.8G ED-IF VR vs Nikon AF-S Nikkor 300mm f2.8G ED VR II