I have a number of older, circa. 1960s, Jason binoculars. Simon's advice is important and correct.
Now, when I run into a prism (housing) dislodged, I have found an adhesive called GOOP to be invaluable in "cementing" the housing back in place ONCE the housing is properly aligned.
I used to get my GOOP at a jewelry outlet, but it is now available in hardware stores--True Value in my instance.
If, however, you do use GOOP, it is imperative to keep the optical channel open for 24 hours or so, to allow the adhesive to totally cure up and not coat any of the optical components in the process.
And, no, I have no vested interest in this product; I have used it on numerous projects, and it just cannot be beat in my opinion. However, be aware that it is rather permanent and can't be easily removed once set up. Good luck, and enjoy your outing.
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Re: Colimate an old Jason Binoculars
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