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Message: <blockquote data-quote="Kevin Conville" data-source="post: 1755628" data-attributes="member: 63161">Obviously the body of the bin is sealed independently at the focus wheel axles"Actually, it isn't ... that's appears to be the problem.The problem is not so much water in between the focusing knobs but migrating down the concentric(?) focusing shafts and into the main bin housing that compromises the waterproofing.Leica do call this out so don't drop it into water when setting the diopter offset!"Help me out here Kevin, how do you know this? Where does Leica "call this out"? Am I to understand you are saying water that migrates past the focusing wheel seal can find it's way into the barrels of the the bin?Excuse me but this makes no sense. What holds the dry gas in? Leica claims a 5m (16+') submersible waterproof rating. Are we to believe this O-ring on the cap of the focuser is responsible for maintaining that seal? That when one adjusts the diopter a little nitrogen goes out and a little atmosphere enters?It is also curious that I've never heard of this during the 20 years and 5 pair of Leicas I've had.Last, apologies to Jay for this thread now being officially highjacked!</blockquote>