Metal mount adapter. Camera mount: Sony A. Lens mount: M42
Metal mount adapter. Camera mount: Nikon F. Lens mount: M42
Metal mount adapter. Camera mount: Canon EF. Lens mount: M42
Metal mount adapter. Camera mount: Canon EF. Lens mount: M42
Metal mount adapter. Camera mount: Pentax K. Lens mount: M42
Metal rear lens mount protection ring for Canon EF lenses. Can be used with filters for safe close up