Why didn’t I think of that: magnetized filters

Carryspeed came up with a new product called MagFilter - those are magnetized filters that can easily be attached to compact cameras. MagFilters are currently available only in 36mm and 42mm sized circular polarizer and can be purchased on Amazon. Here is a quick video demonstration - after attaching a metal ring to the front of the lens, you can easily add and remove the filter:

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  • Michael

    It’s about fucking time, I thought of this years ago!

    • nope. magnets are dangerous. they screw up many mechanics and CCs, harddrives and so on.

      i would much more like some bajonet system.

      we are not screwing lenses, so why filters?

      • Ronald Paterson

        “…we are not screwing lenses, so why filters?”

        Sorry Harry, you lost me there…

        • El Aura

          We don’t screw in lenses any more (we once did, remember M42?), we use bayonets. Similar for hoods (though there are still plenty of screw-in lens hoods). Attaching filters would also be made easier with a bayonet.

          It probably is a chicken and egg problem. With no bayonet filters, when you create a lens with one, there won’t be any filters for it and vice versa. It might also be a little bit more tricky to add a bayonet because of the very small amount of space available on filters (we don’t want any extra thickness). Apart from the chicken’n’egg problem, everybody would have to agree on the standard, ie, even if one lens manufacturer would go ahead, unless everybody agreed to follow using the same bayonet, it will also not get far either.

          • Pablo Ricasso

            I thought Hasselblad had a sort of bayonet filter mount system.
            It would be no different than everyone agreeing on the same thread pitch as they do currently.

  • jas

    Hmm well this guy has been selling quick release filters for a couple of years and might have something to say about this 🙂


    • Jas

      Oh and hes patented so his lawyers may have something to say about it too? 🙂

    • Dave

      I’m not a patent lawyer, just my opinion, but I don’t think Xume necessarily has a slam-dunk case. It would, of course, greatly depend on what Xume claimed in their patent. The implementation in their case versus MagFilter is different. The target application is different as well. Magnetic add-on lenses are now also available for iPhone/iPad cameras.

  • steve

    strong enough for a 77mm cpl ? Not sure i’d trust it with an expensive heavy filter.

  • None of my business

    My Canon lenses have plastic filter thread!

  • HEY

    Where’s my magnetized 1.7x telephoto conversion lens??

  • Yama

    Not sure I’d want magnetic interfaces on a camera where there are risks of EMI.

    Magnets and EVF/LCD screens don’t mix very well, never mind the other performance problems. Just having such items in my camera bag would worry me.

    I’ll give these a miss!

  • prjkt

    cokin have had something like this for a while…

  • Torben

    Or put the filter in the pocket next to the wallet full of Credit Cards – goodbye info on the magnetic strip !!!

  • Zaph

    Lensmate have offered magnetized filter adaptors for some compacts for years too. They work really well, haven’t had any issues with them causing problems at all.

  • Bernard

    The last thing on earth you want near a lense is ferrous dust of any kind. What a brilliant way to get some caught near the lens and on your fingers as you use your camera…

    As said above, add wiping your cards to finish and we are done… LOL

  • cock renwell

    I thought about this ages ago – why doesn’t some manufactor did that much earlier?
    but how’s the optical quality? i guess it simply can’t compete with a Hoya HD UV or
    circular Polarizer, neither B+W HighEnd Filters.

    • rock cockwell

      I doubt it’s even close to “Japan Made”. Eve if it is, what does that mean at all, if it’s made by a yamakuza “xyz” japanese glass company?

      No it won’t be Hoya, Marumi or B+W quality, you can bat on that.

      • mock dickwell

        Pretty much agree.

        BTW, his Carry Speed sling straps are light years ahead of anything Black Rapid makes, but this latest “invention” is downright silly. Not only that it isn’t his invention and isn’t new, it’s been around for some time now but never really caught up.

  • Rich in Tx

    Won’t that ruin the film?

    • Only if you use IR filters – the radiation from those will fog the emulsion 🙂

  • george

    -love the idea, but question use near electronic equip, (and my vintage watch)
    -hasselblad’s bay 60 filters were the best idea in the past, but now there are no standards to much of anything.
    -with photoshop how many filters do you really need anyway

    • Mark

      You can’t fake polarizers or ND filters in Photoshop.

      • AM

        Yes, you can.
        It’s just that some people don’t like to post-process their pictures.

        • Mark

          Polarizers let you shoot through reflections in windows, water surface and changes the way your camera interprets everything in an image, how are you going to fix that in post?

          ND filters let you take 30 second exposures in daylight, how are you going to fix that in post? Gradual ND filters let you expose the sky and ground correctly in one shot.

          I guess this is exposure 102.

          • an onymous

            Fully agree.

            Of course, one can to some limited extent do some shootings without a ND filter and long shutter speed, but that requires one to set the lens aperture at a very high F number to keep the light exposure in balance, which in turn degrades the lens quality a lot.

      • babola

        Of course you can. And many of us do.

        The difference is time involved to mimic the realistic filter effect in post, that’s all.

        • Zaph

          I’d love to see a high quality post-processed result mimicking ND-filtered running water. Stream, waterfall, etc. Any examples?

          • Andrew

            It’s not the ND filter that does ‘that’ to streams and waterfalls, if you’re after the filter as such to assist you with that it would be a combo of polarizing filter combined with slow shutter speed. ND filters are used for stopping down the exposure so that the slower shutter speeds could be used without blowing up the highlights. If you don’t have an ND use a polarizer if you don’t have a polarizer take the over exposed RAW shot of long-exposed waterfall or stream and correct it in post.

            Come on..this is exposure 101.

          • Ronald Paterson

            Andrew, in general I would have to agree with your commentary. I got caught up far too many times at the sight of an unexpected stream or smaller waterfall without any filter at hand and had to do exactly what you said to get the milky-smooth result I was after, exposed for longer but clipped the highlights a bit, which luckily due to fact I shoot Raw I managed to ‘save’ back in Lightroom.

            However, having a proper filter, being it a polarizing or neutral density would have helped – a lot 🙂 Not to mention time saved in front of the computer.

            As far as this new little invention, I’m not phased at all and will give it a miss anyway.

          • Zaph

            “It’s not the ND filter that does ‘that’ to streams and waterfalls”

            Duh. babola said you can do everything an ND filter and polarizer can do in post. Explain how you can slow down the shutter speed in post?

  • Ken Smokewell

    And this is new? How? It’s been offered for years by at least 3 lens accessories manufacturers and the uptake and response has been lukewarm to say the least.

    I’m going to pass. Anything magnetic around my camera is a no-no for me, sorry.

  • Ronan

    No one tell the ‘scientists/engineers’ in this post about the magnets in the camera!!!

    • Ken Smokewell

      Don’t be a dodo…

    • Pablo Ricasso

      Not even close, different type of magnets, Mr ‘scientist/engineer’.

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