voigtlander skopar 25mm f4 Leica M
This wide angle lens has an asymmetrical design with 7 spherical elements. The front element is slightly concave. As all M-mount lenses, it’s manual focus only. It has a tiny effective aperture of 6.25mm at f/4.
Produced by Voigtländer in Japan, THIS IS THE VERSION FOR THE M MOUNT (Leica M)