Archived posting to the Leica Users Group, 1999/01/01
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Joe: Thanks for the advice. The first thing I did with the lens was to shine a penlight through it. Everything is clear except for the cleaning marks. I'll just have to try some pictures with it. I'll take a couple into the sun to check flare. Terry Price (on the rockbound coast of Maine) >Terry, >It occured to me to add that it is a good idea to shine a pen light through >older Leica lenses. They sometimes have a cloudy layer on the internal >surfaces, apparently related to an animal-based lubricant used in the past. >It is hardly visible shen holding the lense up to the light, but is quite >evident with the penlight test. It will cause substantial flare and loss of >contrast. The lens can be cleaned, but the cost of cleaning needs to be >factored into reckoning the lneses' value. >Sincerely, >Joe Stephenson >+++++++++++ >Terry wrote: >>I've just got a 50mm f2 collapsible Summicron (#1167850) that is in nice >>shape except for a bunch of very fine cleaning marks on the front coating. >>Will these make a significant difference in its performance? >> >>Terry