henry link
Well-known member
A few more thoughts on waterproofing and sealing. It would seem that IF porros would be subject to the same changes in internal volume as CF. Perhaps the problem for CF has been making seals that work well with sliding tubes. The Swarovski Habichts have a rather stiff focus, perhaps as a result of the seals.
I wonder if the pressure imbalance from changing internal volume is any worse than what all sealed binoculars suffer from changes in altitude or barometric pressure. I have heard, for instance that sealed binoculars should not be shipped by air, where they might encounter an unpressurized environment. Anybody know anything about that? If it's true, that could happen before you even buy the binoculars. Henry
I wonder if the pressure imbalance from changing internal volume is any worse than what all sealed binoculars suffer from changes in altitude or barometric pressure. I have heard, for instance that sealed binoculars should not be shipped by air, where they might encounter an unpressurized environment. Anybody know anything about that? If it's true, that could happen before you even buy the binoculars. Henry
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