Nikon DF-M1 dot sight

The DF-M1 Dot Sight is a compact, collapsible scope that is compatible with certain Nikon cameras. The portable scope is an ideal tool for telephoto shooting.

You can use it to place an aiming point on your subject and track it without using the camera's viewfinder. This allows you to track even fast-flying birds or airplanes while keeping both eyes open, and easily keep your subject in the center of the frame.