A simple means for eye-level viewing, the black 10mm Metal Optical Viewfinder from Voigtlander is an auxiliary shoe-mounted finder used to approximate your field of view when shooting with a 10mm focal length lens in the 35mm film/full-frame format. The 0.32x-magnification viewfinder uses a reverse Galileo Albada design, and its brightlines are meant to represent the appropriate field of view when focused at infinity. Its construction features five elements for high optical clarity and has a -0.6 diopter for comfortable viewing.