Nikon AF-S Nikkor 500mm F5.6E PF ED 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 500mm. With the max aperture of only f5.6 at 500mm, it is considered a slow lens.
Nikon AF-S Nikkor 500mm F5.6E PF ED VR is weather sealed which makes it an ideal lens for outdoor use, especially when coupled with a weather sealed camera body.