BRNO dehumidifying body/lens caps for Nikon mount



The BRNO dri+Cap dehumidifying system will protect your lenses from fungus and is available for Nikon mount: the kit costs $44.99, single lens or body cap sell for $23.99. The cap holds replaceable silica gel for absorbing the moisture that can lead to fungus or mold. The caps also minimize condensation build-up. Each silica gel changes color from orange to green when it needs to be changed. The caps will maintain the optimum relative humidity (RH) of 35% to 45%.

BRNO dri+Cap dehumidifying system

BRNO dri+Cap dehumidifying system (2)

BRNO dri+Cap dehumidifying system (3)

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  • hemangster

    How necessary is something like this?

    • Greg

      I’d say if it were truly *necessary* then Nikon would have provided it. Depending on where you live and work, I could see this being quite valuable. Excessive humidity is definitely a bad thing.

      Many people pack silica gel in their lens bags, but this makes sure it goes everywhere. $25 for a plastic cap that still needs replaceable gel packs? That might be a bit steep for what it is, but cheap compared to the lens…

    • MZNG


      Buy silica jels bags and put them in your battery slot, which hopefully will be empty, being the camera is on storage thus they should be better removed.

    • CanuckPhoto

      Not a bad idea if you work in the cold a lot and transfer into a warm room. Trapping that moisture from fogging up is worth it.

      • RakSiam

        Or if you live in a tropical climate. Friend of mine in Taipei has a special humidity controlled cabinet for all his gear after some fungus problems.

  • Chaitanya

    I thought they were available for a long time now. I am using this and they are fantastic.

  • Mike

    While a little more expensive than a plastic zip lock bag, it is a great idea for longer term storage.

  • Harry Belagosi

    I thought the point of using silica gel is that it can be heated to evaporate the moisture and then used again?

  • Dan

    When you buy a brand new camera body or lens, it usually comes with a small bag of silica gel in the same plastic wrap as for the item. I figure if this is good enough for Nikon (and Canon), then I’ll do the same. I made a “drybox” for all my gear. I purchased 2 lbs of silica gel from ebay and put it into my Pelican 1560 case along with all my gear. Before I had that much camera gear I did the same thing with smaller bags of silica gel and tupperware.

    PS. Heads up on the silica gel with the blue indicator. Its been said to be “cancer causing”. I bought the food grade silica gel which is clear and mixed it with small amounts of orange indicator silica so I could tell when it becomes saturated.

    • Best option is to buy it in bulk and then use old panty hose to make satchels with it.

    • The ‘blue’ indicator in the silica gel used to be copper sulphate hexahydrate which is blue. When dried by heating it loses the ‘water of crystalisation’ (hexahydrate) and it goes white but return to a blue colour on absorbing water.
      Maybe somebody has found a problem with copper these days but unless you eat it I can’t see how it’s harmful.
      Frankly I’d be more worried about what an ‘orange’ indicator is composed of.
      As a side issue I heard that armies add copper to the soldiers food to stop soldiers getting horny – maybe also an urban myth.

      • ZoetMB

        That’s an urban myth and it wasn’t copper, it was saltpeter (Potassium Nitrate) and the myth started when British soldiers learned that large amounts of it were kept on board naval ships, but it was actually used to preserve meat. Saltpeter can cause relaxation of involuntary muscle fiber (and is sometimes used to treat Asthma) so someone apparently interpreted that to mean that it would suppress sexual desire, but it doesn’t.

        • Thanks for that. I’d always heard it was copper sulphate.
          Copper sulphate would, tho, possibly make one impotent.
          Guess that we’re talking years ago when saltpeter was used to make gunpowder?

      • It isn’t Copper, it’s Cobalt chloride. Blue when anhydrous, pink when hydrated.

        • One could use Cobalt salts too. No doubt.
          However Copper is a herbicide and fungicide (and pesticide)so it has added benefits. In it’s metallic form it’s also used to prevent marine organism growth on below water line marine paints.

  • peteee363

    it seems a bit pricey, i will wait for the chinese knockoff, for a quarter of the price. i can see this for lenses i don’t use much, or the storage of a body. but 25 bucks for two pcs of plastic and a bag of gel? that is about 1 buck worth of material, and a whole lot of profit.

    • Mike

      Tooling and forming is a huge expense at the beginning. Can’t blame them for wanting to make a buck. And Chinese knock off? No wonder world economies are going down the pooper. No one wants to pay for innovation. You should wait for the Chinese version of a Nikon DSLR then. Comes with built in dehumidifier and will tan your right eye socket.

      • Aldo

        well said… where did you buy your US made computer?

        • AM

          It’s not where the product is made, it’s which company is backing up the product. US, Japanese, German, or Chinese, that’s the difference.

          • Aldo

            There are many innovators of legal piracy in the countries that you mentioned who also use cheap chinese labor. The consumer is who backs up companies by buying products… simple.

          • peteee363

            so you are saying i need company support on a inert piece of plastic? i can see purchasing the lens from a reputable company, or the camera. but a piece of plastic? i bet you refuse to buy cheap knockoff lens caps, or rear covers too?

      • peteee363

        yes, i know, i actually make machines. and the cost of tooling is a part of the cost of the product. but! if you take two 10 cent plastic parts, and a 5 cent gel pack, and ask 25 bucks for them, someone in china will sell the whole thing for under a buck, and sell lots more. why not price the item at 3-5 bucks, and enjoy lots more sales. people would be shocked to learn that most grocery stores make only 2% profit on a gallon of milk, yet make tons of money off it. because they make that 2% each week or more, so they can make as much as 30% off thier milk sales per month. i don’t blame them for trying to make a buck, but they are trying to make 22 bucks or more off thier product. in the process, they will invite many competitors to steal thier idea.

        • zoetmb

          You need a math course. It doesn’t matter how many times you sell different quarts (or liters) of milk – a 2% margin is a 2% margin if you sell 1 unit or a million units.

          Having said that, this particular product does seem like a bit of a rip-off.

          • peteee363

            i said per month. they sell at a busy store the same gallon every two days, that is 2% every two days on the same money outlay. so if you have a 30 day month, you can turn 15 x 2% = 30% per month. while an average business gets 5-10% on each outlay per month. this shows your economics knowledge.

            • Nick

              That makes no sense – and is plain wrong. How can they sell the same gallon twice?! But top marks for being patronising as well as incorrect, it’s always a winning combination.
              I’d buy these even at 100 bucks each. Put simply, I travel in humid environments frequently, have 15k’s worth of equipment, and can’t fit my dry box in my camera bag. It’s well worth the money, and that’s what they have based the price on; supply and demand. The price will drop as the supply curve shifts.

            • or pick a name

              I’m not a store owner, and economics isn’t my fav subject either, but I can see it’s wiser to have an open mind attitude rather than assume the “wrongness” of an internet commenter first.
              2% profit per gallon15 gallons sold in a month
              total profit per month = 30% the price of a gallon

              “same gallon” = a gallon is a gallon is a gallon … (having common sense is often much more useful in everyday conversation than being strictly literal)


            • peteee363

              why is everybody assuming i was referring to the gallon of milk, it is the money used to but the milk that is what matters. since you pay your bills in cash, not milk, the milk purchased only counts when sold. if you keep getting back your initial investment on the first gallon back every two days, this is what is counted. because the customer values the milk more then the money to purchase the milk. and i value the money more then the milk. this is how trade works. we could be talking bread or cheese. but milk sells quicker then most items in stores.

            • or pick a name

              OK, so that should have been

              “same gallon” = the price of a gallon is the price of a gallon is the price of a gallon

              I stand corrected.Thanks for the lecture.

            • peteee363

              well, it wasn’t a lecture, more of an advanced economics lesson. you can thank walter e. williams for that. he is my unpaid free tutor.

            • peteee363

              if you use 2 bucks to buy the first gallon, you get your initial investment back in two days, after selling the first. you then keep the profit, and buy the second gallon, using the 2 bucks you just just got back. repeat every two days. and your initial 2 dollars recieves 2% return every two days. i suppose this simple idea is above your educaation level. i also have lots of equipment, and travel in extreme cold, and warm humid, but think a reasonable price is still what i would purchase this for. i can’t imagine paying 25 bucks a pop for twenty of these things.

            • Hen Cockwell

              Love it when we talk about milk in a camera forum.

    • timon_comment

      do not use that,
      Some ultrafine dust has transgressing that surface, so, as you seen camera makers merely have a mini pouch in a box, but never put into inside the camera or a lens.
      In food industries, a mini pouch desiccant directly touched foods, so, ultrafine dust are no problem, but it must be nontoxic.

      Those caps are meaningless, did you do an airproof of camera? did you do an airproof of camera bag? even is airproof but a mini pouch desiccant is too less. The weather-proof camera is not an airproof camera, which is impossible against water vapor molecules.

      a mini pouch desiccant is merely a very brief time and very less moisture absorption to be, which is impossibly for true efficacious to be opening space and long time.

      In RH 60% – 90% space and opening air, a mini pouch desiccant lost the role merely less than 3 hours. It arrived of the vapour balance saturation less than 5 hours.

      if you wanted damp proof, need an automatic humidity-proof cabinet or using a small sealed container and desiccant periodically processed. Also, a smaller-sized sealed container is likely carry through with a camera bag. Using a Lock&Lock 5 or 10 liter can solve more needs, the price is less than for US $ 10 or 15.

      But keep in mind, do not buy a semiconductor refrigeration dehumidification’s humidity-proof cabinet, that is condensate water could lead to grow of fungus inside the cabinet.
      Also, the semiconductor refrigeration dehumidification’s humidity-proof cabinet is incapable to be less than for RH 40%, when air temperature is lower than for 14 Celsius, the semiconductor refrigeration dehumidification will lose the role. Further, a moment stopped run to be humidity immediately rebounded, the power consumption is higher, needs long time continuous running.

      Usually, an automatic humidity-proof cabinet mechanism employs desiccant to absorb moisture, which the automatic humidity switch to control the heating to exhaust of moisture and desiccant recycled, but merely needs running to exhaust of moisture around 1 or 3 times a day, the power merely consumed 10W or 50W and 30 or 60 minutes at a time. You needed to ignore labels, some of the automatic humidity-proof cabinets are often writing a fearsome power 200W, actually not true, that is only for a 1/100sec moment of starting at every time. (non refrigeration dehumidification)

      • William Braker

        My thoughts exactly: the pouches release silica dust (I have enough problems with sensor dust, thank you very much!) and become saturated with moisture in open environments in short order. I’m staying away from this product!

      • peteee363

        i was thinking more for lenses then bodies. some lenses i rarely use, so they are stored most of the time. and i do clean them before use. but i would not trust this with a body. if the dust hit moisture, it would stick to the sensor, and i would have to break out the swabs.

        • timon_comment

          Unluckily, those caps are actually meaningless, them cannot protect the camera.

          a Lock&Lock 5 or 10 liter is very helpful, but needs another Dry-Pack, In amazon US have merely a 40 Gram Si Desiccant, a Lock&Lock 10 liter needed 4 Dry-Packs, per Dry-Pack US $ 5.73, and the Dry-Packs are with reproducible way. But, it is not with AC power to get a recycle, so, you needed an electric cooker and set the heating temperature less than 200 Celsius, which is metallic surface, cannot use the microwave oven.

          In Chinese camera stores, an electric Dry-Pack is around 7 or 12 USD, (70g or 130g Desiccant), a handy small tool.

          In the camera side absolutely banned of the household chemical desiccant, which is likely to destroy your camera or electrical equipment, like chloride alkali desiccant, or is acidic desiccant, and the household chemical desiccant could also flow out hazardous liquids, or is likely the volatile gases to be harmful to rubber and plexiglas, though is minim.

          In amazon US, Electronic Dehumidify Cabinet (automatic humidity-proof cabinet), 21 liter US $ 199, 48 liter US $ 345, not expensive as you live in U.S.
          In China stores, the best Chinese automatic humidity-proof cabinets are less than for a half-price of U.S., or is merely 1/5 price (100 liter), but you are hard to get shipment.

          • timon_comment

            I found in amazon U.S. have Eva-Dry EDV300/EDV333, that is electric Dry-Pack. a package (5 EDV300) is $69, a single EDV300/333 is $17. But, the seller is third party. Per EDV300/EDV333 is working for effective cubage less than for 5 liters.

            Lock&Lock 18 x 11.8 x 4.3 inches 10 liters airproof container $33.62.
            Airtight Large container 40 Cup 16 liters 10X8X9 inches $20.64, Ships from and sold by Amazon
            Snapware 29 Cup 7 liters 8.5 x 6.8 x 10.2 inches airproof container $13.43.

            Glass Hygrometer (2″ Diameter) is $7. Analog Hygrometer 2.25″ is $6.60. They have not 1.5″ hygrometer, 2″ diameter is somewhat overlarge. These cheap hygrometers are not so accurate, you must need to always keep the container humidity less than for RH50%, but is needless to worry what a lower humidity. The sole unsafe thing is higher humidity (over RH50%), especially summertime.

    • ModifiedJason

      While I mostly agree about the price, I disagree about the Chinese knockoff. (We wonder where American and European jobs are going.) Yet people complain about products that support domestic companies because they are “too expensive”. I’m willing to bet that even if it was $10 a cap you would find reason to complain about the price considering it’s “1 buck worth of material”. Think about it, everything we purchase if you break it down to the cost of the materials is a FRACTION of the cost to produce and sell the item. Considering I’ve personally gone through design and production of custom parts in the past (high performance car parts), the R&D, tooling, production costs far outweigh the actual MATERIALS that go into those parts. Not to mention external costs such as shipping, processing, administrative costs and so on. I personally like the fact that someone is being innovative, even if it’s not for everyone or you feel that the cost isn’t justifiable. Their are numerous fine alternatives for people who don’t want to pay for the price to purchase these.

      • peteee363

        most jobs left the usa, not because of the cost of labor. our workers are more productive than any in the world. it is over each level of government thinking businesses are atm machines. also most countries do not tax manufacturers, they tax sales to consumers. former speaker hastert proposed this. each component of a car has tax payments inserted in the cost. from gas tax on the truck, to property tax, to unemplyment insurance. add up all the taxes on things made here, along with regulations, that is why businesses are leaving the country. people always say tax the other guy, tax the trucks, tax the businesses. it adds up, this is why they have left, not because of labor cost.

        • ModifiedJason

          I’m not really trying to argue jobs or China or the loss of jobs in America or Europe (honestly, it’s part of globalization like it or not). My point is the fact that the cost of goods sold include far more than just the cost of materials used to manufacture them. $25 is too much in my opinion as well, but people WILL buy them, the cost may eventually come down as they cover their expenses, reduce manufacturing costs or realize the market for $25 lens and body caps isn’t as large as it would be if they charged less.

          • peteee363

            or as a friend of mine found out, even if these guys made a patent, they will be produced by a knockoff company, then approached with some after the fact royalty scheme. an infomercial stole a product from a friend of mine. he didn’t want to let them, so they went ahead and made them. after the infomercial was on the air, in 3 months time, they said it will cost you x amount of cash to sue, and we will offer y amount per unit sold. so all he could do was accept the y amount, because the lawsuit would have never been cost effective. welcome to the new way to make stuff. by the way the chinese product imported cost less then this guy was paying just to package his product.

  • Arkasai

    I have a little tin with reusable silica that changes color when it’s absorbed moisture. I pop it in the oven for half an hour and it’s ready to use once it’s cool.

  • Aldo

    yeah like people are gonna use these on a d200 lol

  • Nikon Shooter

    Photographers are like golfers- you can sell them any gimmicky piece of hardware. Theoretically this accessory is not a bad idea but at that price outfitting 10+ lenses and 4+ bodies becomes ridiculously expensive. Other than DIYing it, you could also do what I do: get a Pelican case or any other air-tight case that would fit all of your gear and get an industrial design silica container that is meant to be rejuvenated in your oven. You may spend the same amount of money but this way you also end up with an awesome travel case that will serve you well for many years.

    • Nick

      But then you have to take a pelican case everywhere – which is inconvenient depending on how you travel. These are a good idea as they come everywhere with you, and don;t take up much more space than just a normal cap.

  • Rasksasa

    Takes real balls to sell at USD 50 for 2 caps. Looking at the amount of silica held in the picture I did say it would not last more than a few hours unless it is air tight… Which i doubt it is. I wouldn’t buy it at that price

  • Jorge

    You’ve gotta be kidding me? LOL

  • mrterrabyte

    What would interest me more (and be worth the asking price) is if they could implement a static charge type device in the body cap version, that’d attract all the dust in the mirror box/off sensor…

    • gsum

      Forget the silica gel – that’s a much better idea.

    • ModifiedJason

      Interesting idea. Thanks 😉

  • Just saved you money

    Why not just use plastic bags (condensation forms on the outside of the bag), and put silica gels inside the bag?

    • chuck

      ROFL.. maybe you can sell a lense fungas preventer and get it promoted here on nikon rumors. Ziplock bag and lots of descant.. charge a few cents more than what it costs you and make a bundle.

  • Can it use as pin-hole camera?

  • Spy Black

    Well, the cat’s out of the bag, ay? Think about it, what’s to stop you from sticking a silica packet in your existing lens cap? A little more enterprising for a body cap, but how long will it take you to make these yourself?

    You can buy no-name caps for as cheap as $1.25 a pop in lots of 10:

    Doesn’t take much to hack these up and make your own. Too bad they didn’t think of stuff like this 30-40 years ago. Think of how many more functional lenses woudl be around today!

  • ModifiedJason

    Honestly, I think it’s a great idea. It solves an uncommon but potentially expensive problem. The price is a bit overkill at $25 each. I can see $10 a pop for these including a handful of extra silica gel packets with each cap. I think they would sell many more if the price was lower, but maybe after they handle the “must have” sales they will change things up.

  • a4
  • zeum

    people have been taping silica gel packs inside body caps for as long as I can can buy 100 for 4 bucks on eBay.

  • Dairy Farmer

    Since most lenses are not air tight this is not the best solution. Just get some Ziplok bags and gel sacks, job done for a few bucks for all your kit. Anyhow I want to know more about the milk math…..

    • Robert Wong

      About the milk math…I’m going to use a different metaphor. You can sell hamburgers at a gourmet price. You won’t sell very many, but you will earn a lot per hamburger. You can also sell them very cheaply, and you will earn very little per hamburger. Since they are cheap, people are very likely going to buy a lot of them. For the sake of argument, you can price a product higher, or really low.

      At the end of the month, what matters is the bottom line. The argument is that there is more money in the bank account by selling more units at a lower profit per item. You have to work harder at it in terms of shipping more, stocking more, making more, etc.

      -food items that are staples can be sold as a loss leader, because you are likely going to by the staples, in addition to the can of soup, and other items, which will have a higher mark up. You lure them in the store with the cheaper item, and then they buy the higher marked up items as well.
      -when I worked in retail (non-food), the manager was graded on total sales, profit, inventory turns / turnover, and other items. Expensive milk ups total sales and profit. Cheap milk ups inventory turnovers.
      -the neatest trick in retail (risky) is to operate on low margins, and to get items from suppliers at 60 day payment terms, quickly sell it and then use the remaining number of days to invest / play with the money. Basically you get to invest other people’s money interest free for x number of days. The retail operation in essence isn’t the most important part of the business. It just facilitates the loans. That’s for another day….

  • Hawkeye

    Ok, time for a guest post, entitled Awesome Cheap Workaround For A Less Expensive BRNO Cap.” Here goes:

    Take your rear lens cap and tape in a silica gel packet. There’s plenty of space. Each month, change the silica gel packet. I’ve heard you can also microwave your old packet briefly and it’s as good as new. By the way, I’m selling the kit to do this for the low low price of $9.99. It’s a silica gel packet and a piece of tape.”

    • bjrichus

      I’ve got a DIY version of this … Just drop a silica gel pack into the gear bag and you are good to go.

    • JorPet

      You can microwave silica gel packs to rejuvenate them. I have a hearing aid dryer (just a plastic container with a foam insert and indicator silica packet, costs about $2.50). On the outside it has instructions for microwaving the silica packet when it becomes saturated. 1 minute on high, then let it cool. The silica packet is special as well as it has a solid plastic see through on one flat side and then what looks like white mask filter in a dome shape on the other (think half a globe). That would be to keep the silica dust from escaping while still pulling in moisture. It does work wonders.

  • Ballscrubber

    If you have ever tried silica packs like the ones pelican makes you will realize how quickly they can wear out. I monitor my gear with a hydrometer and gave up on silica. Sure it works but those packs shown here are far too small. This is providing a false sense of security because if you are uninformed enough to try these then you are likely making other more harmful mistakes that negate any of those products benefits. Please don’t waste your money on this, there are other more effective ways. If you must use silica look into a bigger package.

  • Sander

    Just bought lenscaps from Optech. They have great rubberseals and fit perfectly, better than the ones you get with your nikkor lenses.

  • Waste of money.

  • or you could just hack one yourself if youre that paranoid about mold and prolonged storage. But if you’re not using that camera, shouldnt you just sell it, anyway?

  • kin notwell

    what works good for canon eqip. is rock salt and flour
    find oven bag add ground rocksalt and flour mix and anything that sez canon
    stick it in oven at 225 untill all wetness is gone

  • Just curios but guys how many of you had actually issue with fungus or mold in a lens or DSLR..? Have been shooting for 20 years and so far nothing!

    • Kon_head

      I suggest you go do some shooting in Thailand in July, you will understand what humidity can do to your lens. Fungus is a big problem if you live in the tropics.

  • Guest

    Supposed it does absorb moisture, how is it going to work on a weather sealed lens? It’s just going to dry out the rear element and that’s it?

  • cbernolak

    i think simple little silica bag in the photo bag will do the job….

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