Description: For using ALL M42 SCREW MOUNT cameras with T-mount telephoto lenses, such as telescope, mirror lens, etc. It supports for infinity for focus. You should remember that the pusher with the fixed ring doesn?for t work, so diaphragm control of the lens is set manually. It is possible to use Macro rings and other accessories. It can be used with other M42 mount adapter to fit other camera models. Not recommended for modifying for T mount of camera lenses. Settings: Put red marks of the adapter and lens collar together. Turn the adapter clockwise till the fixative click. Set T-mount lens. Removing: To remove the adapter you should unpress fixative pin and turn the adapter anticlockwise. MADE Combined with aluminium and brass , for focus for infinity Introduction It allows to keep the for infinity for focus Made of metal color : black Package Included: T2 lens to m42 Adapter x 1 Note: 1. Due to the light and screen difference, the item's color may be slightly different from the pictures. 2. Please allow 0.5-2cm differences due to manual measurement.