Hi Gang,
I recently received my used Pentax 500/4.5. Upon uncrating, I heard some
rattles and discovered three almost paper-thin metal rings of varying sizes.
Their diameters fit on ledges just inside the optical tube at various
points. It's easy to see where they go, as it looks like the adhesive they .
I don't know what they're called or what purpose they serve. My layman's
description is a flange or baffle.
Questions: What are these things? Is this easily repaired? Must I remove
the old adhesive? What kind of adhesive should be used? What is the best
method for application?
Tom C.
