Photographers interested in bird photography will find the Nikon P ED IF AI-S camera lens ideal for their interests. The lens construction of 8 elements in 6 groups gives you an amazing picture quality. With a maximum aperture of f/4.0, this Nikon 500 mm lens delivers bright and clear images, in any lighting condition. The minimum aperture of f/22 in this Nikon camera lens gives you outstanding still images of the moving birds. The 5-degree picture angle of this Nikon 500 mm lens captures maximum area within a single frame. The automatic diaphragm in the Nikon P ED IF AI-S lens gives an out-of-focus background effect to the picture. The 39 mm filter size protects your Nikon camera lens from dust and scratch.