User Tag List

Thanks useful information Thanks useful information:  1
Results 1 to 5 of 5

Thread: Canon 17-40 Bubbles ?

  1. #1
    Member
    Join Date
    10 Jul 2009
    Location
    Brisbane Australia
    Posts
    734
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Canon 17-40 Bubbles ?

    I've had my 17-40L for quite some time just recently I've noticed what look like Bubbles under the lens front element.

    I take care of it the lens spends it life inside my Camera bag when not in use and it appears to be focusing ok.

    Anybody found this kind of thing inside any lenses before ? it does not appear to be causing any problems

    My Lens.jpg
    Jason / Brisbane QLD flickr
    Canon 5D Mk II 40D, 17-40mm f/4L, 24-70mm f/2.8L, 70-200mm f/2.8 L IS.

  2. #2
    Member
    Join Date
    08 Sep 2010
    Location
    Syd
    Posts
    259
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    damm, I'm assuming you've cleaned the front element before taking this photo? (it doesn't look it)
    No idea what it is. Perhaps the bubbles could be trapped moisture? Are these bubbles everywhere or just the things on the outside diameter around the bottom of the pic?

  3. #3
    Member
    Threadstarter

    Join Date
    10 Jul 2009
    Location
    Brisbane Australia
    Posts
    734
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yes it could use a clean its made to look worse from the light I was shining directly onto it for this quick pic

    Anyway the I showed a few people today at a meet-up and moisture was one of the suggestions the bubbles are only around the outside diameter of the lens body/structure

  4. #4
    Member
    Join Date
    23 Nov 2009
    Location
    Brisbane
    Posts
    3,086
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Hello Jason

    I guess it's moisture trapped inside I have never seen it myself but it's what you said made me think its def moisture if you keep it inside the camera bag I think it's wise to invest in a dry box not sure what to do now after the moisture has made it's way in.
    Dwarak Calayampundi

    Canon 5D Mark II, 7 D Lens Canon 24-105mm L Canon 16-35mm II L Canon 100mm Sigma 10-20mm Canon 50mm 1.8
    http://www.wix.com/dwarak/landscapes

  5. #5
    Member
    Join Date
    08 Sep 2010
    Location
    Syd
    Posts
    259
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    yeah not sure how you can get the moisture out, i doubt putting it in a sealed box with rice would help but you could always try.
    Actually being a bit more creative, the lens is weather sealed so you're not gonna get water out without dissassembling it, but what you could maybe try is putting it in an airtight glass container, add some rice. Then heat up your container with a hair dryer or putting it in sunlight. If you're lucky the moisture might evaporate into suspension with the air inside your lens, and then this air may be able to escape outside the lens, leaving you with dryer air inside the lens.
    Worst case (other than burning your lens with a hairdryer), is that the water droplets may reform in the middle of the front element and cause more problems for you.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •