Question about Bushnell Powerview 13-7016 (7-15x35) Binocular

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Water spots inside lenses

I recently droped my binocular in water and now have a hazy film & dry water spots on the inside of the lenses. How do I dismantle the binocular to clean the lenses.

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Re: Water spots inside lenses

On the whole, I'd advise against dismantling binoculars yourself. Unlike most other optical devices, alignement is really important because you need to feed the same image into both eyes. If you're going to end up paying someone to realign the instrument, you might as well get them to do the cleaning at the same time. A.

Posted on Apr 20, 2007

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The eyepiece lenses have something on the inside. Can they be removed for cleaning?

  1. Carefully clean your binoculars by firstly removing any dirt or dust from the main body and straps using a soft microfibre cloth. Avoid the lenses at this point using any form of cloth on the lenses before removing all dirt and dust particles first could destroy them.
  1. Gently remove all traces of grit, dirt or dust particles from the lenses using a soft lens brush or canned air specifically designed for the purpose.
  1. Waterproof binoculars can be rinsed gently under a tap but be sure to use on lightly running water, avoid high pressure water as it could damage your binoculars.
  1. Gently remove any remaining marks using lens cleaning tools such as a lens pen or lens cleaning fluid and lens tissue. Do not be tempted to use kitchen towel or anything else lying around that is slightly rough and may scratch the surface of the lens, only use a lens pen, lens tissue or a lens cloth. Gently wipe the lens using a circular motion working from the centre of the lens to the outer edge. NEVER apply lens cleaning fluid directly onto the glass (always apply to the cloth) and always ensure that the lens cleaning fluid you are using is recommended for the type of lens coatings that have been applied to your binoculars (Do not use general household glass cleaning products or products designed to clean computer screens or glasses. Such products could destroy the lens coatings of your binoculars if used).

May 15, 2011 | Tasco 7x50 Waterproof w/Imp. Compass...

1 Answer

Theres is a water spot inside my binoculars..please tell how to clean it.. please..i need to repair it asap..i work 4 navy engineering

when you take it apart you will effect the collimation..not something to do yourself...and you will probably scratch the coatings trying to

Dec 13, 2010 | Zeiss Classic B/GA 525505 (7x50) Binocular

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Dirty spots on the insides of both large end glass of the binoculars .i noticed this in costa rica 2 years ago. these spots look cloudy and i can't see well when looking at birds.

It's lens fungus. It feeds off the lubricants and some claim it also feeds on the glass coatings.

Strictly speaking it means that the binos are write-offs, but if you can remove the lenses and carefully polish off the fungus you should be ok. There's some evidence that leaving the lenses out in sunlight for a few days kills any remaining fungus due to ultra-violet exposure (doesn't remove the dead stuff though). Some fungi will attack the lens coatings causing permanent damage (reduced image contrast, more lens flare) but the most common type does not.

May 19, 2010 | Canon (5083A002AA) Binocular

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I have condensation/moisture in one of the two lenses of my Nikon Action 7x15x35 binoculars

Nikon Action binoculars are not meant to be 'waterproof'. They give the specification to the Chinese factories to construct the bincular to the retail price point. The higher the cost the more features. Water can damage the inside of a binocular as the contaminants in water can cause fungus to grow. Once that happens the glass lenses or prisms are damaged.

You can try to dry them near a warm air source such as blow heater on warm not hot over a period of time. This will help evaporate the moisture. It will not help if fungal bacteria has started to form.

Depending on the use that caused the influx of moisture you may have a warranty claim.

Aug 21, 2009 | Binoculars & Monoculars

1 Answer

Water inside trying to clean

Why are you using water , which contains impurities

I use alchohol impregnated lens wipes which you can buy over the counter for cleaning spectacles, it also evaporated quickly

Use a lens cloth to polish the glass as it dries off.

Do not over do the application of any liquids on lenses as over time it will seep through the the various elements of the lens causing them to part company and your bino's will lose their sharpness

May 27, 2009 | Praktica Roof Binocular

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I have a Minolta Weathermatic 7x50 binoculars that suddenly I cannot get in focus. Additionaly, I see double on everything I view.

really sorry about that godlen_po. I will report the problem to our support team. Anyways your binoculars requires cleaning. Though they are supposedly water proof they can be affected by conditions like humidity after prolonged use. You would need to take it to proffessional for cleaning. Do not I repeat do not attempt to clean it yourself using water or any other cleaning substance like soap etc., as you may damage the lenses permanently. I screwed up my binoculars this way only to know about cleaning later. If you need any help locating the nearest spot where you can get this fixed feel free to post back. I apologize once again for the incovinience caused. I will verify if its on my side and report to the support team.


Dec 29, 2008 | Minolta Weathermatic Binocular

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

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.

Aug 31, 2008 | Binoculars & Monoculars

2 Answers


You have to open each side ( nikon travelite covers just unclip ) to get to the 4 prisms. Once opened to clean make sure you do not break the glue that holds down the prisms ( move the prisms in their seats and your alignment is out ). Clean with window cleaner and isopropanol to finish.

Aug 22, 2007 | Nikon Travelite V Binocular

1 Answer

Internal cleaning

I don't know about disassembling binoculars. However have you tried drying them out, either in a "dry box" or by using silica crystals?

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