/ Register


  1. Welcome to Mu-43.com—a friendly Micro 4/3 camera & photography discussion forum!

    If you are thinking of buying a camera or need help with your photos, you will find our forum members full of advice! Click here to join for free!

"Bleaching" yellowed rare-earth element glass

Discussion in 'Adapted Lenses' started by qball, Sep 3, 2010.

Top Rated
  1. qball

    qball Mu-43 Regular

    170
    Jun 19, 2010
    I understand you can remove the yellowing of certain rare-earth element glass lenses that have yellowed with age. Like the Konica 57mm/1.2.

    Besides the "brightly lit" room method, I understand you can bleach it with prolonged exposure to UV light.

    What kind of UV light specifically? Like a UV blacklight? Or the type of UV light you would use to sterilize things?

    [​IMG]

    or

    violight-uvwand.
     
    qball, Sep 3, 2010
    #1
  2. antithetic

    antithetic Mu-43 Regular

    150
    Jun 7, 2010
    City of Angels
    Couldn't you leave it in direct sunlight for a few days/weeks?
     
    antithetic, Sep 3, 2010
    #2
  3. qball

    qball Mu-43 Regular

    170
    Jun 19, 2010
    Yeah, but I'd rather leave it in a closet with a light, as we have six mischievous dogs and my lens would end up as a toy.
     
    qball, Sep 3, 2010
    #3
  4. antithetic

    antithetic Mu-43 Regular

    150
    Jun 7, 2010
    City of Angels
    Oh. Didn't know mischievous dogs were in the mix. =]

    I found a thread on Flickr which discusses using UV light to get rid of yellowing on the lens. Basically one poster found the yellowing decreased by using a regular UV blacklight. It's slower but safer (for humans).

    Hope this helps.
     
    antithetic, Sep 3, 2010
    #4
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Accept Learn More...