I just bought a used Schneider-Kreuznach Symmar-S 6,8/360 – a beautiful lens! But, alas, it has a problem touched upon in a few other threads. However, I didn't find a satisfying answer by a search through these threads.
The problem is white dots. Not fungus, not dust, but hundreds of small dots in different sizes around the edges of the lens. They fill the whole area between glass and barrel (maybe 5 mm wide and all around) and the phenomenon is both on the front and rear element.
In an earlier thread, it was suggested that this was paint flaking off but, no, this is different: it looks more like a starry heaven, with hundreds of small dots. It cannot be paint flaking off, since there are no paint-flakes in the lens, right? It seems deliberate, actually, not something that would have happened over time … Exept from this everything is clear and nice (the glass is clear etc.).
In another thread it was stated that this is harmless, although someone called it "Schneideritis", which sounds like an illness, which usually is a bad thing …
If anyone has any more insight into this, please let me know!
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