Voigtländer
21/25mm Viewfinder (silver)
Viewfinder for 21mm and 25mm Lenses
A shoe-mounted Voigtlander viewfinder that does double duty, giving you a bright clear image, with brightlines marking a 21mm lens and a 25mm lens. There's a parallax indicator at 25mm. This viewfinder has 4 lenses in 4 groups, magnification of ×0.42, and a sturdy metal construction