I performed this repair on one of my lenses (possibly my 500/4.5). I put a tissue in there to keep glue from dripping on the rear element and then used a stick of some sort to apply a couple drops of glue to the plate that the baffle rested against. I then slipped the baffle into place. I didn't use much glue. Just a spot or two.
I worried about damaging the lens a lot more than I worried about fixing it right. I wasn't at all concerned about the baffle coming loose again. The one thing I didn't want to do was make the situation worse. Tom Reese Subject: Lens Repair Question > 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. > > >
