Cemented Groups & Balsam Seperation?
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Re: Cemented Groups & Balsam Seperation?
Thanks. Actually cleaned up well, old balsam was liquified for some reason. Just need to re-cement them. I'll do some searching.
Appreciate it.
saxyomega90125 wrote:
I have seen several microscope lenses that had balsam separation in a doublet. Common problem. The cheap solution is to take the group out, soak it in lab-grade acetone for a few days or lab-grade isopropyl alcohol for a week or two, then reassemble with immersion oil replacing the balsam (microscope lenses typically self-space well).
So it can be done, but if the affected group has more than two elements then things might get hairy.
I've noticed a lot of photographers aren't hardware tinkerers, so this may not be the best forum for this kind of info. Find a forum dealing with microscopes or especially binocs - some guys in Cloudy Nights do this stuff. Those are the people who can tell you how best to be rid of the old balsam and point you to a good modern cement to replace it (obviously immersion oil in a camera lens is a bad plan).
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