Gary Clennan wrote:
Good point Edward. I'm still not on what the mechanism is for this "corrosion" though... Most corrosion is associated with metals and not glass. I would guess that environmental conditions is the main factor at play here. Perhaps this issue is more prevelant in certain climates? Ron - maybe you can sent their tech a pic or two and have their feedback before sending it in....
BTW - last night I noticed a 50mm f/1.2 listed in the lens listing in my camera? I don't think Leica ever produced an m 50/1.2 - correct?
Gary, I think they use the word corrosion because the coatings are indeed metallic. The glass itself, which is also a mineral, does not corrode, but the coatings have a reaction with humidity, causing gazes to accumulate beneath them and produce bubbles.