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Dropped new Celestron Skymaster 15x70 binoculars. Nothing appears broken, but now have two images. Can I repair this. and how? Thanks. Dan

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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.

Posted on Aug 29, 2010

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Fortunately you have moved one the inside lenses, if you can unscrew you binoculars you may be able to adjust it yourself ,hope this helps

Posted on Jul 22, 2009

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Collimation of any binos is easy once you find whichever mechanism the manufacturer chose; most often with screws on the housing or at the eyepieces, or with concentric rings at the front lenses of the binos.

Only divert the tubes a little making two separate images next to each other, and then make adjustment looking at an object having vertical and horizontal lines. Like for instance a building...

Vertical collimation (for horizontal lines) is critical, horisontally however the eyes can adjust quite a lot, but at a price of fatigue.

On these binos the adjustment screws are likely to be at the prism housing. Carefully pry loose the edges of the rubber coating, they should be within 5 mm or so from the edge. One pair of screws is usually at the top back laterally, one pair close to the front edge more medially.

Good luck:-)

Posted on Dec 29, 2012

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If you try to fix yourself you will only make it worse...you need an optical collimator..if i can be of further help...5088331232....larry

Posted on Jul 31, 2009

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1 Answer

Lens alignment


generally under the edges of the covering at the eyepiece end there are tiny screws that are used to adjust the prisms in the binoculars, generally out of alignment issues are caused by the prisms being out of alignment.

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I dropped my new Nikon Action 8x40 on the carpet, still it did chip an inner lens because you can look in the end and see chipped glass inside :( How can I repair it?


If you can see broken lens glass, you have a major problem.
Check to see if you can still use them normally as any other
binoculars. If you can, you can ignore the glass chips.
If they obscure the image, or blur the image, or interfere with
focussing, you will have to get the binoculars repaired. It may
be cheaper, if the binoculars are out of the warranty period, to
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I have a Celestron 7by50 waterproof binoculars that I droped.Now when I look trough them I see 2 pics. at differant hights also they sound like the prism is loose.I have had this on cheeper binoculars and...


Your binoculars either have a bent or broken yoke assembly (the bit which carries the eyepieces) or one or more prisms have came unseated. Your description firmly suggests the latter.

The first repair involves replacing the entire yoke assembly: the part is expensive in comparison to the retail cost of a new pair of binoculars and with labour charges on top is not usually a cost-effective repair except on really high end models at prices far higher than yours (which can be replaced for around GBP£200).

The second repair is straightforward and fairly quick for anyone with the right collimation equipment, but the screw(s) need to be secured with thread-locking liquid afterwards.

Your binoculars have far higher repair costs than usual as they are waterproofed so need to be serviced by the correct specialists who know how to replace the seals and who are able to recharge the nitrogen filling if disassembly becomes necessary. As the prism seems to be loose it's unlikely to be a mere matter of adjustment.

Either way, you really need to get a Celestron servicing agent to diagnose the fault and provide you with an estimate, or you can go ahead and see what's wrong yourself (they're broken anyway!) and see whether you can repair things sufficiently that they just need re-collimation and gas filling, a far cheaper repair. If the seals look good, then wipe them with a thin smear of silicone grease upon re-assembly (sold as o-ring lube at any plumbing shop)

I hope you manage to use this information to fix your binoculars or at least that it assists you to choose your next course of action. Please take a moment to rate the free answer I have provided for you and any testimonial which you might wish to add is always welcome!

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1 Answer

I seem to have a slight double image. when I unscrew one side of the lens a bit it lines back up, but leaves the lens loose. What could be wrong and can it be fixed? thanks,Brent.


You have the classic signs of the most common binocular fault: a bent or broken eyepiece carrier yoke.

The cause is usually due to the binos being dropped or the eyepieces getting knocked. The only cure is a replacement yoke, but the repair is rarely cost-effective unless the binos are really expensive and top-quality models. When last available new, yours sold for just over US$100 and repairs will typically far exceed that price.

Broken/bent yokes cannot be repaired: If bent, then it's near-impossible to unbend them accurately enough and in any case the process will always either break the yoke or will severely weaken it. Broken yokes cannot be glued together as the contact point is just too tiny for the loads it carries, and as it usually bends before breaking you'd simply end up with a bent yoke afterwards even if you could glue them.

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Double image occured after the omega 40 X 70 binoculars were dropped


There are a series of lenses and prisms inside the binoculars. When the unit was dropped one of more of those elements have been dislodged and that is what is causing the double image. You can check with the retailer to see if there is a repair center in your area. The way these units are put together they are difficult to take apart, repair, and put back together. Depending on the cost of the unit you might be better off replacing them. Check with the retailer to see what they say.

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They have been dropped and now have a double image


Chuck them away and replace them. Seriously. Your binoculars have suffered the most common fault which occurs to all makes and models: a bent or broken eyepiece yoke assembly.

If broken it cannot be fixed without replacing the whole yoke assembly, and on budget models like anything that Tasco sell it's cheaper to buy new and the spare part is probably unavailable anyway. If the yoke has bent then it's virtually impossible to unbend it without breaking it, and even if you do it's usually not accurate enough. So you try again and it breaks... On the rare occasions where you're lucky enough to get it right, the yoke has fatigue cracks and soon breaks regardless. Due to the loads involved and the tiny contact patch, gluing is a waste of time and usually just turns a broken yoke into a weak and bent yoke.

Given that you can now buy very good quality similar or superior binoculars from Bresser and others for around £10 to £15 new any kind of repair simply makes no sense. There's nothing wrong with cheap binoculars in general, but you have a simple choice; pay a lot for top quality models which then have full after sales and spares back up or pay very little and replace them more often. Even then, the yoke assembly for a high quality brand will pay for around six to eight complete new pairs of low cost binoculars. Your call...

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Image appears double and slighly off when viewing


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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....larry@reichinstruments.com

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