Switch to English Language Passer en langue française Omschakelen naar Nederlandse Taal Wechseln Sie zu deutschen Sprache Passa alla lingua italiana
Members: 71,931   Posts: 1,585,450   Online: 1085
      
Page 1 of 2 12 LastLast
Results 1 to 10 of 13
  1. #1
    RobertoMiglioli's Avatar
    Join Date
    Aug 2011
    Location
    São Paulo, Brazil
    Shooter
    Medium Format
    Posts
    69

    Re-cementing lens

    Hello.

    I´v just re-cemented the front element of my Voigtländer Heliar 105/3.5 lens with Canadian Balsam. So far, so good.

    How long should I wait untill the balsam hardens enought so I can reassemble the lens? Does heat help?

    Thanks in advance.

  2. #2

    Join Date
    May 2013
    Location
    US
    Shooter
    Large Format
    Posts
    2,060
    What method did you use to get it apart?

  3. #3
    RobertoMiglioli's Avatar
    Join Date
    Aug 2011
    Location
    São Paulo, Brazil
    Shooter
    Medium Format
    Posts
    69
    I boiled the lens. They separated in less than 3 minutes. Then I cleaned with isopropyl alcohol.

    It was much more easy than I thought it would be.

  4. #4

    Join Date
    Jul 2010
    Location
    Southern USA
    Shooter
    Multi Format
    Posts
    4,145
    When I mounted microscope slides with this medium the recommended drying time was 2 weeks.
    A rock pile ceases to be a rock pile the moment a single man contemplates it, bearing within him the image of a cathedral.

    ~Antoine de Saint-Exupery

  5. #5

    Join Date
    May 2013
    Location
    US
    Shooter
    Large Format
    Posts
    2,060
    I've done my share of research on this. Never actually did it yet, but all my research suggests at least 2 weeks if not a month.

  6. #6
    RobertoMiglioli's Avatar
    Join Date
    Aug 2011
    Location
    São Paulo, Brazil
    Shooter
    Medium Format
    Posts
    69
    Thanks.

  7. #7
    Jon Goodman's Avatar
    Join Date
    Jul 2005
    Location
    Dallas, TX
    Shooter
    35mm
    Posts
    656
    Bom dia Roberto! At the very minimum 1 week. Usually 1 month is best. Balsam dries differently...some faster and some slower. You can read an article I wrote on Fotomozaic.ro if you are interested: http://www.fotomozaic.ro/artikel.php...21&idstory=412
    Jon

  8. #8

    Join Date
    Sep 2008
    Shooter
    Multi Format
    Posts
    809
    Why use balsam and not a more modern UV-curing cement?

  9. #9

    Join Date
    Sep 2011
    Location
    Adirondacks
    Shooter
    Multi Format
    Posts
    3,686
    Quote Originally Posted by EdSawyer View Post
    Why use balsam and not a more modern UV-curing cement?
    Balsam is much easier to fix if you make a mistake. Some of the modern UV cements can be a nightmare to take apart. I recemented a lens with balsam I took directly from the tree - so it's free, too!

  10. #10
    RobertoMiglioli's Avatar
    Join Date
    Aug 2011
    Location
    São Paulo, Brazil
    Shooter
    Medium Format
    Posts
    69
    Hi Jon. I read your article before re-cement my lens and it helped a lot, thank you very much.

Page 1 of 2 12 LastLast


 

APUG PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Contact Us  |  Support Us!  |  Advertise  |  Site Terms  |  Archive  —   Search  |  Mobile Device Access  |  RSS  |  Facebook  |  Linkedin