Several years ago, I rescued a pair of Celestron Pro 10x50 binos from a river eddy. They didn't appear to be damaged, so I let them dry out. At this point, the image looks pretty clear, though there is a little "double vision" so they may need collimation. I'd like to get them checked out by someone who knows what they are doing, but Celestron doesn't answer my e-mails. Any suggestions?
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Re: Repair of Celestron binos found in river
Thought i answered this before but at my age who knows....the problem is water contains minerals that will eventyaully corrode the optics or at least the coatings.anyway if you want i can give you an esimate to repair....firstname.lastname@example.org
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The battery in my pair of FreeFocus Fieldvision 10x50 binoculars is a AG3 button cell. I cannot tell you more because the rest of the writing on it is in either Japanese of Chinese characters. I hope this helps
most prisms have coating on their air to glass surfaces. Chances are you have already degraded their original quality, even with the smoke gone. From past exp. you will be better of getting another bino...
The yoke which carries the eyepieces has broken, allowing one lens to move independently of the other.
They can be repaired by replacing the entire yoke assembly (gluing is never accurate enough and never lasts) but the repair will not make economic sense as it will be cheaper to throw them away and buy another pair unless you have them covered by an insurance policy.
Unfortunately, I cannot recommend a Japanese repair outlet, the closest I've used in your part of the world is in Kuala Lumpur, Malaysia. I've always found getting repairs to cameras and other optical devices to be near impossible in Japan due to the prevalent culture of buying new rather than getting things fixed.
Apart from in Kuala Lumpur, I've generally found that optical repair specialists worldwide typically have a six week turnaround time unless you pay a lot extra for the 24/48 hour turnaround aimed at professionals, so even if you can get the repair done cheaply you may decide to just replace them anyway.
However I have found an old list of Nikon repair outlets which you may wish to try and contact to ask for advice.
Hope this helps, if so please return the favour by taking a moment to rate my answer.
Your question is listed under "Zhumell Oberwerk 45 25x100 Astronomy binoculars". If these are what you have then they're an extremely high end expensive specialist item and will need professional realignment. I'm assuming that if you do own a pair of these then you're knowledgeable enough to have done all you can to adjust them correctly.
I suspect that you have a regular pair of 10x50 or similar binoculars, with a centre focus wheel and hinges. If this is the case then try to wiggle one of the eyepieces back and forth: if you can easily move it and the other eyepiece remains steady then you have a broken hinge. This is a very common fault especially if your binos have been dropped or if they've been stored in their case upside down (i.e.standing on the eyepieces).
A broken hinge is normally a write-off as there is rarely sufficient area to us epoxy glue on and the metal used is not usually suited to being brazed. Even when the hinge can be repaired it's normally permanently misaligned.
Either resign yourself to using one half of your binoculars or buy a new pair. In the UK LIDL regularly sell a pair of Meade 10x50 binos of excellent quality for just over £10 and that's only a little more than a bottle of epoxy resin glue costs. You may be interested to know that one of the world's most successful supernova spotters does so in his back garden in the UK using just half a pair of old 7x50 binos.
Don't "unscrew" the binoculars. there are no user servicable parts inside. the collimnation adj screws are beneath the rubber boot just under where your index fingers rest when looking through the bino's. use a jewelers screwdriver to tease the boot up and stick a small nut or something in. then put the binos on a stable surface and play with the screws a bit while watching the images. you can get them pretty close this way.