PENTAX SUPER PROGRAM W. XR RIKENON FAST f1:2 50mm LENS WORKING REF: 9791D
RIKENON FAST STANDARD LENS. XR 1:2 50mm. I am glad to share my knowledge and help others: just ask. without stripping the lens, be they photographic, binoculars or other. This is the limit and extent of the examination in this regard.