Dust Donut Upgrades the Weather Sealing of Any Canon EF Mount Lens


About three quarters of the EF-mount lenses out there are not weather sealed. Because of this, using those lenses often leads to more frequent sensor cleaning, dust and even water accumulation inside your camera body.

Fortunately, a simple but effective idea from California-based photographer Tyler Sterbentz fixes that problem. It’s called the Dust Donut:

When we say simple, we mean simple. The Dust Donut amounts to a small rubber gasket that you place on your EF-mount lens and forget about. Once it’s on there, however, it’ll protect from water and dust, keeping your sensor and the inside of your body cleaner and safer.


It probably won’t offer the same amount of protection that current weather-sealed L-series lenses do, but for $20 it gets pretty darn close. According to Sterbentz, each Dust Donut is precision machined to fit just like the rubber gasket on L-series lenses.


The Kickstarter campaign has already blown through its original goal of only $2,000 (for an initial production batch) with 38 days to go. If numbers keep climbing that first run will turn into quite a few more.

For now only EF-mount Dust Donuts are available but Nikon, Olympus and Sony versions are on the way (a $3 pledge will get you notified when those launch so you can hit up the early bird specials). If you do happen to own a Canon, you can head over to the Kickstarter and pre-order one of the originals for $20 (once the campaign is over the price goes up to $25). The first batch is expected to ship in March.

Dust Donut: Add a weather seal to the mount of any DSLR Lens [Kickstarter via TechCrunch]

  • Rob S

    I want!!! But I shoot Pentax :(

  • Mantis

    Shut up and take my money!

  • matt

    just use a rubberband

  • Zach

    No doubt that this is brilliant. BUT, lenses are pretty durable as it is. Speaking from experience, I have an old Quantary 19-35mm…the lens is crap. I have had that thing covered in salt water while doing a landscape shot. The lens still works perfect. My point is, if a lens like that can sustain a dunk of salt water and still work fine, I’m sure a kit lens from canon, nikon, sony, etc. can sustain a lot more…

  • Matthew

    …..How has no one thought of this before??

  • David Portass

    Sigma need these on their lenses

  • chris

    or you just use an rubber o-ring, costs about 1$ and has the same effect

  • Chris

    Great idea for a product, terrible pitch!

  • John Dunne

    Canon’s weather sealing on their L lenses is a lot more then a gasket on the base of the lens. I’m struggling to see why anyone would pay $20 or $25 for this, but it looks like 139 people out there are.

  • Alex Szecsi

    I wondering how many PRO Photog went a hardware store and buy some rubber for this in past……

  • D4

    I see what ur saying, but i can only think that people would rather spend $20/25 on this for a non weather sealed lens, than have to pay out more to have the camera fixed?

  • Faux Tog

    Then buy their weather sealed lenses.

  • David Portass

    I think he forgets that people starting out might not be able to afford a pro spec weather sealed lens but might still want to shoot outdoors when conditions aren’t brilliant, this will help them

  • William Brawley

    This would be nice on lenses like the 35L and 135L, which I believe are weather sealed everywhere except at the lens mount. That or use a strip of gaff tape for a quick fix.

  • DarrenWard

    So you seal the rear of your lens but leave the front element, zoom ring, focus ring, any extending parts and your camera body open?
    If you want weather protection on the cheap get some of those Op/Tech rainsleeves, you can get four of the ones that protect a flash too for less than this product.

  • VSM Photo

    I’m going to wait for the Knock off. $25 is ridiculous for 3 cent piece of rubber.

  • Tom Weishaar

    I’ve got three L series lenses and my 70-200 IS ii and the new 24-70 ii both have torn rubber seals. I’ve read somewhere on the forums that canon charges $150 to $200 to repair. This seems like an interesting alternative

  • antonomy

    yea… i didnt think an o ring was a genius idea….

  • Daniel

    There’s no way that’s possible, but the only Canon repair prices I’m familiar with is CPS pricing. I was under the impression it was closer to 30-40, since its usually pretty quick to take the back end off.

  • Ivan

    A new OEM rubber dust shield will cost you $22 on ebay. It takes less than 10 minutes to repair depending on the lens.

  • Matt

    I think the point is that a gasket on the base may not be enough to make it weather sealed. Depending on the lens there may be more areas that can let water in like a focus ring or zoom. I’d be a little careful.

  • Sascha

    I dont believe that the lens mount is the point where water enters a camera or a lens! The lens mount is a quite tight connection and analogue Canon or Nikon Cameras without that a seal or gasket never had any problem with water entering there.

    An the weather sealing in a lens is more than a gasket at the lens mount!

    And especially a camera body does not become weather sealed by changing from a lens without gasket to a lens with a gasket.

    But today people fund and buy any crap without thinking about it.

  • Stitch I’lalu

    what!? a rubber o ring for 25 bucks? You can buy a whole silicon skin for your camera for twice that

  • Bret M

    I’ve explained something similar to this, but wide and wrapping the base of the lens to people for several years now and was always laughed off. Kind of disappointed I never actually did anything with it since it’s somehow worth almost $20k now.

  • Bret M

    This is still not a great solution, any lens that extends at all (almost all consumer lenses) will suck in air/dust/water through those tubes. It may still help against the camera body but water could still leak through the elements and drip right in.