Archived posting to the Leica Users Group, 2002/03/10
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]If the lens has been out of use for a long time before you got it it, chances are that those tiny dust specs will increase in number as you use the lens. This happened to me. The specs are probably rub-offs from the aperture blade. My experience is that when the number of specs gets to two dozen or more, then image quality suffers. I had my lens cleaned by an independent repair shop doing jobs for my authorized Leica dealer. They did not manage to put the lens back together the way it should be, so I sent it back. Came back with another problem so I sold the lens. I have been told that with some versions of this lens it is difficult to put the aperture blades back, but that was not the problem I encountered. You may wish to consider getting rid of it before the problems develops further and the lens may drop in value. >I have a 35 Summicron M that I got used and when shining a flashlight >through it from the front, I notice tiny specs on the inside of the rear >surface. They look almost like oil from the blades might have evaporated >onto the lens surface, or perhaps tiny dust specs. > >Is this anything to worry about in terms of affecting image quality? Or, am >I being too uptight? I certainly don't notice any quality difference >between other lenses. >The exception is that my Summicron 50 seems sharper. But I haven't noticed >anything taken with the 35 that made me say that there must be something >wrong with the lens. Part of it I don't know what to look for. The photos >taken with this lens seem fine to me but I wonder if they would be better >by having it cleaned... >-- >To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- Christer Almqvist D 20255 Hamburg and / or F 50590 Regnéville sur Mer - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html