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Author Message   Br1078lum Tinkerer Username: Br1078lum Post Number: 440 Registered: 11-2010 Rating: N/A Votes: 0 Posted on Wednesday, December 26, 2012 - 07:17 pm:    I tried this for four days on a Yashica ML 50/1.9, and saw no difference. I had the lens about three inches away from the lamp which had a collector hood on it, so the rays would be concentrated towards the lens. Finally took the lens apart, only to find that the front group is a sealed unit, unlike the rear group which comes apart, so I couldn't get to the fungus. I'm going to turn it into a clock. PF