Canon Lens Mount Converter P Adaptor Canon FD Camera to M42

This is a genuine vintage Canon lens mount converter P, made in Japan. It attaches to the front of a vintage Canon FD, FL, or R mount film camera, and when attached, allows the use of widely available M42 screw mount threaded SLR lenses. The adapter is ruggedly made and measures around 7.5mm (0.3 inches) thick, 63mm (2.5 inches) in diameter and weighs about 20g. Operation: Rotate the inner ring so that the small screw in the groove aligns with the red dot. The adapter has been tested and is in good working condition and has light scuffs from usefully working order. The breech lock fitting mounts onto cameras and locks securely, and lenses screw in smoothly. Align the red dot on the adapter with the red dot on the camera, then rotate the outer ring so it locks on the camera breech