OM System LC-77C Lens Cap for M.Zuiko ED 300mm F4.0 IS PRO

The LC-77C is the front cap made for the M.Zuiko Digital ED 300mm F4.0 IS PRO. It seats inside the hood, which is why a generic 77mm cap tends not to work on this lens.

On a prime telephoto that lives with its hood extended, the cap is the only thing keeping rain off a large front element between shots. This is the correct part number rather than a substitute.