Replacement for ---- M42- Adapter Ring is camera, replacement for Camera (A-1, -1 Program, F-1, FTb and others). M42 lenses (replacement for , replacement for , replacement for , replacement for Mamiya, replacement for Zenit).Adjust manually ---- M42 screw lens focus infinitely, no ROM connection on the adapter. The membrane control of the lens is adjusted manually. Auto diaphragm, auto focus, or other functions will not work properly when using this adapter.Perfect design ---- M42- Adapter Ring have a smooth surface is easy to install and allows for focus. Made of sturdy alloy, stable and reliable, durable.NOTE ---- "STOP MODE" must be used when dispensing if the lens does not have the capability of not having aperture controlled by the camera body.Easy to carry ---- Lens Adapter replacement for is made of sturdy alloy, which is sturdy and durable, but weight is only 30g, small and easy to carry, it won't the photographer too much.Colour:black + silverMaterial:MetalPackage Contents:1 x Lens AdapterOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.