| Author | Message | ||
     Der_uli Tinkerer Username: Der_uli Post Number: 9 Registered: 05-2010 Rating: N/A |
I have 1.8/50 Zuikos, never dissassembled them, but had similar problems with a doublet lens from an enlarger. It was glued in place, and had visible separations right in the center. My solution was to put the complete lens assembly on a piece of thermal insulation, then to heat it up evenly with a heatgun until the cement separated. Its smell was of epoxy. Heating up and cooling down slowly is important here. Never touch the lenses with cold tools!! After cleaning I cemented the lenses back together with canada balsam. If you don't want to go that far it will suffice to pasteurize the front group, that is, to kill the fungus by keeping 90 deg. C for some minutes. It will stay visible but does not grow anymore. -uli |