Question about Optics
That's a pretty vague question: The focusing mechanism on most binocs is a spiral shaft with a follower - essentially a "jack screw". The threads may be stripped, or the follower may have slipped off the shaft. You can probably remove the end caps from the shaft and disassemble it to resolve. Be careful not to contaminate the lubricated sliding parts with dust/dirt while doing so...
Posted on Nov 29, 2014
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Posted on Jan 02, 2017
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