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I have Minolta binoculars MK 2121062, STANDARD 7x-21x50, multi-coated. A lens or prism appears to have come loose inside the right viewer, and is rattling around. So the right viewer is not usable.

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Posted on Jan 02, 2017

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  • 73 Answers

SOURCE: Binocular repair

Yes they can be but need to be completely taken apart and cleaned. The salt will corrode any metal parts such as screws etc. The water may have left a coating on the internal glass services. Any impurities in the water may cause fungus to grow. Professionally done this will cost a tidy sum so a quote would be best. The warranty wouldn't cover water immersion if they are not meant to be waterproof. You could ask but Minolta no longer make binoculars and have forwarded on their servicing here is the web address
http://ca.konicaminolta.com/support/contact/binoculars/

You may find that for the cost of repair you can purchase a replacement set. Minolta binoculars are heavily discounted now. For sentimental reasons I have paid more than a binocular is worth to have it repaired.

If you are going to buy a new set and still want to try at home....BE ADVISED this may RUIN the alignment and you should ONLY DO IT if you are going to replace them and DO NOT CARE if they end up in the rubbish bin. THIS IS A LAST RESORT THROW AWAY FIX.

Try and unscrew the objective barrels, the ones with the large lens. If they come off you should have access to the inside. If they don't unscrew easily stop. You will damage them. Flush them out with clean water and let them dry naturally. Avoid letting them dry where dust can enter the inside. This may clear the salt from inside them, Depends on how long since they were dropped into the water. The salt may have caused damage to the glass coatings. When dry, screw the barrels back on. You may end up with a double image. This may be able to be corrected by loosening or tightening the barrels. THIS IS A HACK FIX AND YOU SHOULD ONLY DO IT IF THE COST TO REPAIR IS TOO EXPENSIVE AND YOU ARE GOING TO REPLACE THEM.

Posted on Aug 01, 2009

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  • 1 Answer

SOURCE: I cant find friction adjustment on Minolta 10 x 40 binoculars

Hi Ray:
I have Minolta binoculars with the same issue, I believe that I also have the same Minolta model: 10x40mm, roof mounted prisms, 5.6 degrees, waterproof (WR series) and model number j-b35.

Have you found any solution for the loose center hinge?
josch799@yahoo.com

Posted on Jan 09, 2010

miket756
  • 2702 Answers

SOURCE: Minolta Standard Zoom 7x to 15x x35 binoculars

yes it is fixable its the inner lenses coming loos and they will need to be fully striped down and cleaned the body air blasted out and then all lubed and put back together before being re-gased,,,standerd overhall job,,,pricy too,,,

Posted on Mar 03, 2010

Obertelli
  • 3006 Answers

SOURCE: I have an old tasco 7x-15x35 zoom binocular.

You can't.

Tasco optical products are very cheaply made items, usually bought direct from whichever factory already makes the same or a similar model and then Tasco have their badges and packaging added.

They are consumer grade models which are not designed with longevity or repairs in mind; they're worth little when new and almost without value as used items.

The only repairs which can be done are by Tasco themselves whilst their products are under warranty. Except for the most minor of repairs, a warranty claim will simply involve exchanging the faulty item for a new one as any labour expended in repairs will often cost Tasco more than the wholesale price of a new unit.

Your only fixes are to live with the missing eyecup; to visit a binocular repair shop (not exactly commonplace) and see if you can buy an eyecup which can be adapted by yourself to fit; or to replace yours with another pair. You'll usually find that there are plenty for free on your local FreeCycle or Freegle group but they'll often have the even worse fault of a broken eyepiece yoke. But the price is right so it doesn't really matter if you have to collect five or six pairs before getting a good pair...

With all due respect, 7x-15x35 are going to be optically atrocious, so replacing your current pair is not a bad idea.

Posted on Mar 08, 2010

  • 24 Answers

SOURCE: The prisms on the two

Hi How much did they cost and how old are they, look through the bino's the wrong way if you can see marks or lines then believe it or not you have fungus growing so forget it. you must have dropped them to put them out! so claim if you can and buy some new ones. hope this helps

Posted on Apr 09, 2011

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How do i dismantle a canon 15x50 is binocular


On standard binoculars the main lens housings unscrew fairly easily with just hand pressure and the eyepiece lenses sometimes need a small screwdriver to release a locking screw before unscrewing.. I have never yet had compact binoculars apart so I can't comment about those.

Binouculars are assembled in conditions that would make the average operating theatre seem grubby by comparison. It is not wise to dismantle binoculars unless absolutely necessary and then only to do so in very clean and dry surroundings, avoid touching the lenses to avoid marking the coatings and most importantly don't touch or disturb the prisms. Recorrelating binocular prisms is a skilled job requiring much patience and ideally the use of specialist equipment.

The service is not easy to find and not cheap either.

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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.

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1 Answer

Minolta Standard Zoom 7x to 15x x35 binoculars


yes it is fixable its the inner lenses coming loos and they will need to be fully striped down and cleaned the body air blasted out and then all lubed and put back together before being re-gased,,,standerd overhall job,,,pricy too,,,

Mar 03, 2010 | Optics

1 Answer

We had a fire and my binos got smoked inside. I took apart the front and cleaned the prisms in front and lenses. How do I access the back prisms? How do i get the cover off the prisms at back of binos.


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...

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1 Answer

Dropped unit. Knocked the prisims loose. All


It's quite easy to dismantle and inspect, look for tiny retainer screws around eyepiece and/or unscrew lens shrouds. Normally the prisms shouldn't come loose in average to good quality viewers, they'd be held in by some sort of retainer, eg- flexed, spring tempered metal, where you screw in one side and then have to flex (bend) the metal to screw in other side over the back of the prism. It sounds like yours may use an adhesive retainer, if so clean of old residue and use fresh silicone, or may have broken the clip and or screws. But it may just have popped out, in which case reattach it. Make sure the prisms are seated properly, 1 hardly visible flake of glue or dirt under the prism will offset vision noticeably. I would say you may be lucky and find an honest repairer for about $45.00 if prisms aren't damaged.

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I just got an old set of kalimar Model K7070 Binoculars ( 7X-15X35)from my father. They seem to have some type of water drop marks in the left lens. Are these worth trying to repair. I do not know what he...


The water drop marks you are seeing may be seperation of the lens coating. Most binoculars after WW2 have some form of anti-relective coating on the lens. This is applied to the glass surfaces in varying degress by various manufacturers. Its intended purpose is to reduce the amount of light that is reflected off the glass so that the image you see is brighter. Your windows at home that aren't covered actually don;t allow all of the light to come through!
What they all have in common is that the coating is applied onto the glass. Over time like anything that is stuck on or painted it can begin to peel off.
You could try asking a repair place if they caqn replace the lens but most likely they would need to change both so that they have the same coating. The binoculars are worth more for sentimental value than the cost of repair as a similar replacement set would cost as much. Zoom binoculars are not known for their optical quality. Often this 'watermark' effect doesn not interfere with the view. If your sentiments say fix them regardless do so. If not hold onto them as a keep sake.

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1 Answer

I cant find friction adjustment on Minolta 10 x 40 binoculars


Hi Ray:
I have Minolta binoculars with the same issue, I believe that I also have the same Minolta model: 10x40mm, roof mounted prisms, 5.6 degrees, waterproof (WR series) and model number j-b35.

Have you found any solution for the loose center hinge?
josch799@yahoo.com

Feb 01, 2009 | Optics

1 Answer

Binocular repair


Yes they can be but need to be completely taken apart and cleaned. The salt will corrode any metal parts such as screws etc. The water may have left a coating on the internal glass services. Any impurities in the water may cause fungus to grow. Professionally done this will cost a tidy sum so a quote would be best. The warranty wouldn't cover water immersion if they are not meant to be waterproof. You could ask but Minolta no longer make binoculars and have forwarded on their servicing here is the web address
http://ca.konicaminolta.com/support/contact/binoculars/

You may find that for the cost of repair you can purchase a replacement set. Minolta binoculars are heavily discounted now. For sentimental reasons I have paid more than a binocular is worth to have it repaired.

If you are going to buy a new set and still want to try at home....BE ADVISED this may RUIN the alignment and you should ONLY DO IT if you are going to replace them and DO NOT CARE if they end up in the rubbish bin. THIS IS A LAST RESORT THROW AWAY FIX.

Try and unscrew the objective barrels, the ones with the large lens. If they come off you should have access to the inside. If they don't unscrew easily stop. You will damage them. Flush them out with clean water and let them dry naturally. Avoid letting them dry where dust can enter the inside. This may clear the salt from inside them, Depends on how long since they were dropped into the water. The salt may have caused damage to the glass coatings. When dry, screw the barrels back on. You may end up with a double image. This may be able to be corrected by loosening or tightening the barrels. THIS IS A HACK FIX AND YOU SHOULD ONLY DO IT IF THE COST TO REPAIR IS TOO EXPENSIVE AND YOU ARE GOING TO REPLACE THEM.

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1 Answer

Pattern appeared on interior of lens/prism


What you see is fungus . It comes off very easily BUT if allowed to grow it will damage coating and glass because the organism releases hydrofluoric acid. So the key is to clean as soon as possible. You can do this your self but be careful around the prisms because even slight movement here will upset your collimation ( will get 'double image')and then you will need to have your nbinocs aligned properly.

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