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I've had a set of Predator C5 binocs for the past 3 years. Suddenly the right side will not focus. The left side still works fine. Was wondering if something has come apart inside and if so where do I get them repaired. Hunting season is upon us and I depend on these binocs. Mark Maynard Hudson Falls ,NY

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You have a very high quality pair of binoculars and you're doing exactly the right thing in seeking a professional repair.

If you click here you'll be taken to the Steiner Service Center website for the USA. They state a turnaround time of about 2-3 weeks and you may find that the repair is covered under warranty.

I hope you manage to use this information to get your binoculars fixed quickly. 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. Happy hunting!

Posted on Oct 02, 2010

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I have a pair of pentax 10x42 DCF HRc binoculars that will not focus properly througn the right eyepiece. Just wondering if this is a common problem and is it worhtwhile getting repaired


The binos will rack focus both at the same distance, you need to rack focus left side to distant image with left eye only, then turn diopter focus to focus right eyepiece. Diopter focus is thinner wheel behind focus wheel

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My 18x50 IS binoculars are broken; the right eye piece won't focus and I hear a clunk inside when I turn it over; the left focuses just fine. What can I do and where; here in las vegas?


Sounds like you've dislodged one of the prisms inside. A service center can look it over for you, but from personal experience, it's cheaper to replace them than pay to ship them to/from the service folks plus the estimation fee just to find out that they'll have to be replaced, anyway. Sorry.

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I have a set of Steiner Military Marine 7X50 binoculars and now they don't seem to be focusing "together" If you look through one eye cup it looks fine, same as the opposite side. But when you...


I think you mean the two sides are not quite pointing in the same direction. This is called collimation, as in "the collimation is out". Alignment would be the everyday word. In binoculars, collimation faults are usually the result of a knock causing one of the prisms to shift slightly. It can be simple to put right, for a skilled person who knows what he is doing, if adjustments are available. Or the binoculars may need disassembly and an optical bench. I imagine that you would be able to replace these more cheaply than fix them, unless they are very high quality or collectable. I have made a mess of a few pair, and had a few successes, always with binocs that were uneconomic to have repaired professionally.

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I bought the 10x25 camera binoculars and only one lens will focus using the center dial. Its almost like the other one needs to be focused at the eye piece itself. The pictures are not clear and are...


It is common for binoculars to have one independently focusable eyepiece.  If one eyepiece can be rotated, then that is the case.
If that is the case, focus through the one that DOES NOT rotate using the center control until you get a sharp image on that side.  Then rotate the eyepiece on the blurry side until the blurry side is sharp.  If you succeed at this, from henceforth the center control will focus both eyes adequately

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Try doing the focus the opposite way. Firstly using the centre focus place the left side into sharp focus. Then, closing your left eye, rotate the dioptre ring on the right hand eyepiece to bring that side into focus. Open both eyes and from then on only use the centre focus.

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1 Answer

One side won't focas


You don't say what model binoculars you have, but there are two possibilities (well, three, but the third one is that your binocs are broken - lets try the other two first!)

Some very fine binoculars have individual focusing for each eyepiece. You focus each side for your eyesight. If that's the case with your binoculars, there won't be a central focusing control.

If you DO have a central focus knob, it's possible that your binoculars have a "diopter" focus on one or the other eyepiece. Look at the rim of the eyepiece for a marking that looks like "+ . . . | . . . -" or something similar. What you want to do is focus the binocs using the central control so the the UNMARKED eyepiece is in focus for you (close one eye to focus), then switch eyes and focus the marked eyepiece by rotating the eyepiece rim until both eyes have good focus.

Binocular manufacturers do this because many people have better vision in one eye than the other, and many people also prefer to use binoculars without their glasses. Hope this helps.

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1 Answer

I am suddenly seeing double images theough my binoculars.


Up close to the eyepieces around the barrels are small screws that you can use to "collaminate" your binocs. The screws aren't meant to be accessed by the owner and most manufacturers cover them up with the material that surrounds the binocs. Of course the binocs in their current state are useless anyhow, so I wouldn't hesitate to peel up the material to look for the screws. If you do it carefully, you can reseat the material anyhow. Then once you locate the small screws, put the binocs on a stand or a table outside. Focus on something far away using one eye. Then using both eyes, you adjust the screw on the other eyepiece while looking through the binocs. Adjust until you get a single image. You can use loctite, or nail polish to "glue" the screw in the final position if it is really loose.

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1 Answer

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Assuming you are focussing correctly. When binoculars are out of collimation the most usual effect is double vision as the optical axis do not line up. The only thing you can do is to take them to a binocular repairer. The problem is the cost. Proper repair need the use of a device known as a collimator and it is a laborious task to do it properly. Your binoculars do not carry a high monetary value and a proper repair will cost more than a new binocular of similar specs. Porro prism binoculars mostly have the objective lenses set further apart than the eyepieces. This holds true except for reverse porro prisms which are the other way round. Roof prisms have both the front and rear lenses inline.
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www.coralreefphotos.com

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