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.
I have had the same problem with a 400 Takumar. To fix the ring, my
repairman used some kind of black-colored silicone. Not my first
choice, but this may have rendered the repair economical.
Andre
