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Right eye does not seem to focus, while left eye functions fine.,

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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.

Jul 24, 2012 | Canon (18x50) IS Binocular

1 Answer

The right eye is blurey and dirty


Hello, clean the outside of the lens with a good optical cleaner. If you have, then trying adjusting the focus for each eye. Try both ends of this binocular at one eye at time; such as, left first, then the right eye until there are focused. That is if you can focus the optical end and they leave you with the eye lens for focus. Let me know how it works out. stewbsion

May 10, 2011 | Yukon NVB Viking 3.5x40 RX

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I see double image unless I take the lens as close as the binoculars can go


thats how binoculars are. Yours in this case is really strong. the closer you are to something, looking at it, the more magiflyed you going to be. try view things far a distance, really far away. no more double right?
Everything you need to know to become an expert:
on this website: http://www.chuckhawks.com/binocular_basics.htm
It is surprising how many people do not know how to focus binoculars correctly. There are two common focusing systems used in binoculars.
The first is individual eyepiece focus. This system is simple to understand, and easy to manufacture. It also lends itself well to sealed optical tubes, and thus is usually the focusing system used for waterproof binoculars. Individual eyepiece focus means that to focus the binoculars to your eyes, you simply focus the left eyepiece to your left eye and the right eyepiece to your right eye. There is no centrally located focusing mechanism. It is done like this. Look at something in the distance. Close the right eye (or cover the front of the right binocular), and focus the left eyepiece to your left eye. Close the left eye (or cover the front of the left binocular), and focus the right eyepiece to your right eye. You are finished, until you need to look at something at a different distance, in which case you need to repeat the process.
Because individual eyepiece focus is time-consuming, center focus is more common. Unfortunately, very few people understand how to correctly use center focus binoculars. Here is how it is done. Aim your binoculars at something in the distance. Close the right eye (or cover the front of the right tube), and focus the left side of the binocular to your left eye using the center focus control, which is concentric with the pivot shaft between the binoculars. (Note: the left eyepiece itself does not focus on center focus binoculars.) Next, close your left eye (or cover the front of the left tube), and focus the right eyepiece to your right eye. DO NOT touch the center focus control while you are focusing the right eyepiece to your right eye. Now you are finished. What you have just done is adjust the binoculars for your individual eyes. (Practically everybody's left and right eyes are different.) From now on, you only need to adjust the center focus control when you look at things at different distances. Center focus is faster and easier to use than individual eyepiece focus, once you have initially set the binoculars for your eyes.
Binoculars are commonly described by using a pair of numbers, as in "7x50" or "8x25." The first of these numbers refers to the magnification offered by the binocular. Magnification is why most people buy a pair of binoculars. In the examples above, "7x" means the binocular makes whatever you look at appear seven times closer than it does to the unaided human eye. "8x" means the binocular makes whatever you look at eight times closer than the unaided human eye. "10x" makes things look ten times closer, and so on. The first number used to describe binoculars always refers to their magnification. Common binocular magnifications are 6x, 7x, 8x, 9x, and 10x.
There are also variable power (zoom) binoculars, such as 7-21x50. These almost always perform much better at the low power setting than they do at the higher settings. This is natural, since the front objective cannot enlarge to let in more light as the power is increased, so the view gets dimmer. At 7x, the 50mm front objective provides a 7.1mm exit pupil, but at 21x, the same front objective provides only a 2.38mm exit pupil. Also, the optical quality of a zoom binocular at any given power is inferior to that of a fixed power binocular of that power. In general, zoom binoculars are not the bargain they seem to be.
Remember that everything (including movement) is magnified when you look through a pair of binoculars, especially your own shakes and tremors. So the higher the power, the harder it seems to hold the binoculars steady. 6, 7, or 8 power binoculars are easier for most people, even those with very steady hands, to hold reasonably still. The higher powers sound like a good deal, but often result in jiggly, blurred views. This is why 7x binoculars are chosen by so many experts, including the military.
Power affects brightness. Other things being equal, the higher the power, the dimmer the view. And power also affects the field of view of the binoculars. Again, everything being equal, the higher the power, the smaller the field of view. So, as you can see, power must be balanced against other desirable characteristics when choosing binoculars.

May 09, 2011 | Bushnell 240842 Binocular

1 Answer

Cannot focus single focus side of monarck binoculars


First you must focus the left eye on a given object with the center focus wheel. Once the left eye is sharp while looking at the same object adjust the right eye to be as sharp as possible. The right eye diopter is only meant to adjust for the small differences between the eyes.
Thomas E. Kuenzli Eagle Optics (800) 289-1132

Dec 18, 2010 | Nikon Monarch ATB 7345 Binocular

1 Answer

My left eyepiece on my Zhumell 20X80 will not turn to allow me to focus it. The right one works just fine. I don't want to force the left eye piece. Is there a locking mechanism I'm not aware of? Is this...


Typically the left eye piece is not adjustable. You focus the left eye with the center adjustment and then focus the right eye with the eye piece adjuster. I hope this helps.

Dec 12, 2010 | Zhumell SuperGiant Astronomical Binocular

1 Answer

I was wondering about the calibrations in the center between the eye pieces' and how they are used


It's there to help you set the binoculars quickly to your own inter-pupillary distance. Just make a note of the number the pointer on the scale is at when you find a comfortable setting for your eyes and then when you next use them just set the pointer back to the same number. The scale is the angle of the yoke, and you'll often (but not always) find that the scale works on other makes and models as well to help you quickly set the binoculars up to your own preferences. The left eyepiece will also have a dioptre scale (not always accurate) so when you have sharp right eye focus, adjust the left eyepiece until you get sharp left eye focus as well.The scale on the eyepiece indicates how many dioptres (+/-) your left eye is different to your right eye. If you know the left eye setting and the yoke angle, you can quickly adjust most binos to your own comfort settings. Fixed focus binoculars are different in that they have dioptre adjustment on both eyepieces, so left eye settings from regular binos are not directly useful on fixed focus binos, but the yoke angle may still apply.

Sep 01, 2010 | Bausch and Lomb Legacy 12-1056 Binocular

1 Answer

One eye or the other seems slightly out of focus.


Hi, one of your eyepieces has an twisty eye piece, its printed on the outside + & -, probably the right side? If its the right side you close your left eye and focus with your right, then open both & HEY Presto, you've got vision in both! Thanks Mark

May 03, 2010 | Zeiss VICTORY 10X40 BINO

1 Answer

The focus between the two lenses is not synchronized; when I zero the eyepiece lenses and try to use the center wheel to focus, I can only get one clear image at a time.


Here's how:
Focus the left side first.
Close your left eye and now rotate the right hand eyepiece (dioptre ring) until the right hand side is clearly focused.
Open both eyes! Surprise! both sides should now be in focus simultaneously!!

Jan 29, 2010 | Nikon Action Binocular

2 Answers

How to focus my Zeiss 10x40B TP binoculars


Your binoculars are known as the Zeiss Classic or what was once known as the Dialyt. They focus differently from the usual binoculars like those mentioned. The rear wheel is to focus both binocular barrels while using them. The front focus wheel is adjust the right eyepiece to suit your right eye. Binocular manufacturers take into account each eye is slightly different. To focus the Dialyt...First close your right eye and turn the rear wheel until the image is sharp in the left barrel. Leave the focus wheel alone. Now close left eye and adjust the front wheel until the image is sharp for your right eye. The image should now be clear and in focus for both eyes. It should not be needed to use the front wheel from now on. The rear wheel is what you will use to change the focus from near to far objects.

May 31, 2009 | Zeiss Classic B/GA 524013 Binocular

1 Answer

Insta-Focus focusing problem


first open and close the binoculars untill they fit you eye width,now adjust left eye with the flat section located on the center hinge,now turn right eyepiece till clear. note: once you have adjusted right eyepiece you only have to leave it in that position in order to focus from near and far.........good luck......larry@reichinstruments.com

Nov 24, 2008 | Bushnell "Insta-Focus" Binoculars

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