Nikon PK-13 contax This is a flip-up eyepiece

This is a flip-up eyepiece magnifier used for precision focusing- great for macro or copy work

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

The Olympus SP-350 is an older 8mp digital camera that runs on standard AA batteries- nothing too fancy

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 This is a flip-up eyepieceThe 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.