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Can not focus

The two images do not quite merge as one so I can not get a sharp focus

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Souns like its out of collimation. dont know if its worth repair or not,if you want we can talk further...larry@reichinstruments.com

Posted on Dec 10, 2008

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2 Answers

Focusing problems


Hello Samaro,

This effect is produced when the tho sides of the binoculars are not focusing the same.
Since you sayit is present at long distance, it might be that one barrel is stuck and is not focusing the same as the otherone when you scroll the middle "focuser".

What you can do is open it up and try to clean it, also see if there is something, that is making one of the lenses not move forward as far as the other one.

Good luck,
Dahaka

Jul 28, 2008 | Fujinon CD 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

Hello, I got a Nikon 10x42 SE that fails to merge two images no matter what distance is set between the pupils. Other people are also unable to merge images, so my eyes are not the problem. Looks like a...


Hi, yes it does. Apart from approacing Nikon, you may be able to find an optical enthusiast locally who could check them out and who has the equipment to adjust the prisms. I was lucky to find someone who could do this in the Bournemouth area in uk but don't have his address now. I think I found him through a shop or local advertisement.

Dec 11, 2010 | Nikon Binoculars & Monoculars

1 Answer

After several years use without accidents or damage, cannot focus to one image any longer and left eye will not focus to clear any longer. They are Barska, 8x42 reverse porro prism.


I fear these have suffered damage without your knowledge. The collimation has gone bad, hence the two images instead of one. As the left side doesn't focus properly, I would guess that one of the prisms in that side has shifted position, which would account for both defects. This can be fixed by a skilled and knowledgable person, or made worse by someone who does not know what they are doing, but in the end, it may be too expensive to have them put right by an expert, as very good binoculars are available quite cheaply today.

Nov 16, 2010 | Barska Optics Binoculars & Monoculars

2 Answers

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

Aug 11, 2010 | Sharper Image Binoculars & Monoculars

1 Answer

I am seeing a double image whel I look through my binocular.


Hi,

Most binoculars should allow you to grip the two sides and pull them closer together to fit the distance between your eyes.. Have you tried this?
What you should see is the two images come together to form one.

If you have tried this already and you still get the two images then it's possible the model is just too wide for your eyes.. If they're new you could try return them for another type that fit better..

If this works for you then here are the instructions for setting up the binoculars to give you the best result for your eyesight..


This is more common than you would think.. Here's how to set up a pair of binoculars to suit yourself.
Any good binocular will be able to do this and the reason is to allow you to adjust them for the difference in strenght between your two eyes. I wear glasses myself and sometimes contact lenses so it's good to be able to quickly adjust them.

1. turn the binoculars over so you are looking at the underside.
2. on the eyepieces can you see on one eye(usually the right eye) a little plus - minus marking. The eyepiece should be able to rotate a little to each side of this marking.
3. Set the rotating eyepiece to the middle setting.
4. Look through the binoculars as normal and bring the two sides together until you form the two circles that you see into one.
5. Pick an object app 10 meters away.
6 Presuming that the adjustable eyepiece is on the right hand side then close your right eye, look at the middle distance object you chose with your left eye and use the central focusing knob/wheel in the middle to bring your left eyepiece into focus.
7. Now, close your left eye and adjust the rotating right hand eyepiece while looking at the same object until your right eyepiece is in focus.
8. The binoculars should now be set for the differences in strenght of your eyes and you can use the middle focus control as normal.

Most binoculars have a soft rubber eyepiece that can be folded back for people who wear glasses but I, like most people I know who wear glasses, find it horribly uncomfortable.

This method allows you to set them for yourself and if someone else uses your binoculars you can quickly reset them for you.

Hope this helps...


- Oh yeah, sorry, forgot to mention.. This set up is so you can use them without wearing your glasses.. Much more comfortable!!

Oct 20, 2009 | Sharper Image Binoculars & Monoculars

1 Answer

I bought these for my husband. In trying them


Difficult to answer specifically without knowing the model. But binoculars are designed to view objects in the distance. They all have a limit as to how close they will focus based on the magnification and design. Objective lenses that are far apart such as on a porro prism binocular will not focus very close. The nature of the design of having the objectives further apart than the eyepieces doesn't allow it. When trying to focus too close the image will appear blurred and double. That is the nature of the design. 9 feet or 3 metres is considered quite close to focus a binocular and is usually for a model designed to do this such as a roof prism where the objective lens and the eye lenses are inline. A specialty binocular such as the Pentax Papilo will close focus to 50 centimeters. It has been designed so that the objective (large lenses) lenses converge.

Take into account when focusing that binoculars are also designed to compensate for differences in each eye. One of the eyepieces either right or left will adjust seperately. For binoculars with a center focus ring. First focus using the center ring with one eye covered. The eye that should be covered is the one that doesn't have the adjusting eyepiece. When the image is clear close the eye you have just used and leave the center focus alone. Focusing on the same spot look through the eyepiece that adjusts and turn the eyepiece ring until the image is clear. Now all you have to do is focus using the center ring only as the binoculars are adjusted for each eye.

Some binoculars do not have a center focus and each eye will adjust seperately.

Jul 29, 2009 | Binoculars & Monoculars

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

Image appears double and slighly off when viewing


I was having a double vision problem with my Barska 10-30X50 zoom, 195FT/100YDS binoculars. One image was always higher than the other. This was tolerable at low zoom, but was further aggravated the more I zoomed in. I found that I could grasp both barrels and twist them in opposite directions (one side up, the other side down) and force the two images to merge--but that was a strain and an unpleasant viewing experience. As an experiment, while looking through the binoculars, I grasped the far end of the right barrel and twisted it on its axis. Nothing happened at first, but after a certain amount of resistance it began to rotate independently of the body. Lo and behold, this shifted the barrel's axis, and the image for that eye moved vertically! I turned it until the two images merged, and now I'm thrilled to say that the problem is solved! I don't have a clue if this would work on any other brand or model, but it's worth a try!

Apr 06, 2009 | Tasco Sonoma 16-840WA-1 (8x40MM) Binocular

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