SCHNEIDER MAKRO-UNIFOC 12 LENS ADAPTER MOUNT MINT CAPS KEY 17,4-29,4mm BOXED.There are many pictures displayed. Please allow all the pictures to down load in order to get the best impression of the condition of this item.The lens is in absolutely excellent + mechanical and cosmetic condition. Front and rear original lens caps included. Delivered in makers box.Industrial Focus MountsThe Unifoc 58 and Unifoc 76 helical mounts are used for focusing the enlarging lenses, which do not contain any internal focusing mechanism. The helical mounts offer a total focus range (Z-axis travel) of 25.7 mm and differ only by their rear mount. The Unifoc 58 has "male" T2 thread (M42x0.75). The Unifoc 76 has a "male" M58x0.75 thread. The Unifoc 76 is the best choice for cameras with long linear CCDs.Each Unifoc has an internal "female" Leica mounting thread (Ø39x26 Gg 60°), adaptable also to M39 x 1.The final focus setting can be locked by a knurled locking screw and additionally secured by an opposite Allen screw.The helical mounts can be adapted easily with extension tubes and adapters to a wide range of imaging applications.