Leica M Visoflex II housing 1959-1963. With 90° right-way-round magnifier 4X and OTZFO / 16464K universal focusing mount

Visoflex is a mirror housing which converts an M camera from a rangefinder into a reflex camera. Compared with modern (D)SLR it is basic and primitive, but it is functional. It seems to have taken a new lease of life on the M8. It consists of a housing containing the mirror and a slide-on pentaprism. The pent prism can be replaced by the straight finder. This finder switches right and left. The advantages of Visoflex III over II are a higher clearance for higher M cameras, specifically the M5, M6 TTL, M7 and M8, a more functional mount which does not need the removal of the prism and handgrip, and a quick return/flip mirror setting.
Visoflex II housing 1959-1963. With 90° right-way-round magnifier 4X.
A lighter and more compact reflex housing with optical thickness reduced to 40mm to allow lenses of 65mm and above to be focused to infinity. It is suitable to be hand held. , the whole assembly had to be turned for vertical pictures.
This housing is made with the M mount on the camera side and the Leica M mount on the lens side.
Visoflex II. OCLOM/16456 and OTXBO 90°
OTZFO / 16464K universal focusing mount for 65mm Elmar / 90mm Elmarit / 135mm Elmar lens