Nikon PK-13 contax all-metal leveling head designed to

all-metal leveling head designed to slot in between the head and legs of your existing tripod

but the taking lens is clean and the shutter works well

with B+W's premium Nano coating for modern high performance lenses

Worth noting: while it doesn't affect picture-taking functions

The Pentax Refconverter M sounds like it does something really fancy

Nikon PK-13 contax all-metal leveling head designed toThe Nikon PK 13 is a 27. 5mm extension tube for manual focus F mount lenses. Will mount to any F lens and body and transmits aperture information via AI coupling. Light paint and finish cosmetic wear, good function. Includes rear cap.