Hello,
I am embarrassed to admit that the single best piece of glass I own has endured a terribly unfortunate circumstance. My enlarging lens, a Schneider APO-Componon HM 4/150, sat in open air for 10 years without the lens cap for the rear element.
As a result, the rear lens element has a wealth of dust on it. I imagine the dust to be slightly caked onto the lens surface by changes in humidity.
Embarrassing as this is, I am delighted to be returning to the darkroom. Would anyone care to suggest the best way for me to clean this lens? Or is this a clear case of sending it off to a pro.
Thanks in advance,
Lewis
ps. In the pictures below, the crud immediately around the outside of the lens is supposed to be there. It is foam and does not need to be removed. I assembled a makeshift lens alignment device, modeled after a commercial product sold by Calumet or Zone VI or somebody. The foam belongs to that mechanism and should not be causing any problems. Thanks again!
pps. I cleaned the back of the lens board and added a third pic of the lens. The first view from an angle makes the lens look a bit worse of than it really is.
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