The Nikon action finder (also called a sports finder) is designed for those who must shoot while wearing eyeglasses, sunglasses, protective glasses, goggles, or a helmet.

The action finder is available for the following Nikon SLR bodies that have interchangeable viewfinders:

F (unnumbered action finder)
F2 (action finder DA-1)
F3 (action finder DA-2)
F4 (action finder DA-20)
F5 (action finder DA-30)