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BX1 problem (1 Viewer)

I'm guessing that the air pressure inside the binocular must still about the same as the place where it was sealed, which must have been a lower elevation than your location. The eyepiece tubes lengthen spontaneously in an effort to increase the internal volume and equalize the pressure.

In my case, that happened. It sort of combined with the stiction problem
I was havving, for these little 'thunks', jumps in focus. A tiny .030 hole eased
the pressure. The stiction was still an issue, just not as bad.

Others' mileage may vary....nothing is perfect and the same.
It isn't like they all have it or none have it. It's rare.
 
Recently started bird watching, got a pair of the BX-1s. I noticed today they were out of focus after putting them down for a few minutes. The focus knob wants to "scroll" clockwise (when in position to look through them) for some reason. It's as if something is compressed inside them (anti fog gas?) and it's pushing the tubes to lengthen them. The knob moves on it's own. .....

I just came across a review on Amazon.com where somebody reported the same for a Kowa 8x30 of similar build. So, "haunted" freaks are not a singular Leupold problem.
 
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