Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: Lens separation and use of transparent oil

  1. #1

    Join Date
    Feb 2004
    Location
    Woodlawn, Ontario, Canada
    Posts
    273

    Lens separation and use of transparent oil

    I obtained an older 250mm f6.7 Fujinon that has separation on the front and back elements and covers the whole lens. I can remove the elements from the barrel and have heard that if there is a visible crack oil can be applied to fill the separated elements. Can any member please advise of the type of oil I should use and should the whole of the glass be immersed in the oil or do I just apply to the crack with a brush. Any advice gratefully received.

  2. #2

    Join Date
    Aug 2013
    Location
    Chicago
    Posts
    1,792

    Re: Lens separation and use of transparent oil

    Someone will surely say you can do it, and it will be OK, but you might want to consider some of the things that they haven't:

    It is probably little understood that oil is a solvent for natural resin. That could make the problem worse, or it could spread to other elements. Not to mention possible migration to the diaphragm, etc., depending on how careful you are and the oil you use. Oil also evaporates over time, so there's the additional problem of it fogging surfaces, more migration, etc.

    Haven't a few people reglued their own elements at home? I bet there's a how-to somewhere on the web.
    Thanks, but I'd rather just watch:
    Large format: http://flickr.com/michaeldarnton
    Mostly 35mm: http://flickr.com/mdarnton
    You want digital, color, etc?: http://www.flickr.com/photos/stradofear

  3. #3

    Join Date
    Mar 2008
    Posts
    361

    Re: Lens separation and use of transparent oil

    Quote Originally Posted by Simon Benton View Post
    I obtained an older 250mm f6.7 Fujinon that has separation on the front and back elements and covers the whole lens. I can remove the elements from the barrel and have heard that if there is a visible crack oil can be applied to fill the separated elements.
    Sound like a perfect invitation for a fungus to grow on it.

  4. #4

    Re: Lens separation and use of transparent oil

    Opticon?

  5. #5

    Join Date
    Aug 2013
    Location
    Chicago
    Posts
    1,792

    Re: Lens separation and use of transparent oil

    The barcode scanner Opticon, the contact lens Opticon, or some other Opticon?
    Thanks, but I'd rather just watch:
    Large format: http://flickr.com/michaeldarnton
    Mostly 35mm: http://flickr.com/mdarnton
    You want digital, color, etc?: http://www.flickr.com/photos/stradofear

  6. #6

    Re: Lens separation and use of transparent oil

    Opticon resin No. 224. A fracture sealer for gemstones with the RI of quartz.

  7. #7
    Tracy Storer's Avatar
    Join Date
    Nov 2001
    Location
    Oakland CA
    Posts
    932

    Re: Lens separation and use of transparent oil

    Or pack the lens off to Focal Point Lens in Co for recementing. he does a very good job. Separating the elements is the hard part but that's already done !
    Tracy Storer
    Mammoth Camera Company tm
    www.mammothcamera.com

  8. #8

    Join Date
    Jan 2009
    Location
    Denmark
    Posts
    5,972

    Re: Lens separation and use of transparent oil

    Sorry, but you will have to describe/image separation!

    Is is just regular Newton's rings?
    You describe it as old - but my guess is that it synthetic optical glue which has lost its contact on one or more glass surfaces. Thin oil was used as laminating material in very early - pre-photographic achromats - but I doubt you will be able to get the oil in without forming air bubbles of some size.

  9. #9
    come to the dark s(l)ide..... Carsten Wolff's Avatar
    Join Date
    Jul 2004
    Location
    Australia at the moment, Spain or UK one day perhaps
    Posts
    475

    Re: Lens separation and use of transparent oil

    Sell it (even to me) and get another one.
    http://www.jeffbridges.com/perception.html "Whether you think you can, or think you can't, you are right."

  10. #10

    Join Date
    Feb 2004
    Location
    Woodlawn, Ontario, Canada
    Posts
    273

    Re: Lens separation and use of transparent oil

    The separation shows as an oily rainbow pattern across all of the internal lens glass. I was given 4 Fujinons with this separation problem and was just interested in seeing if there was a way to fix them economically.

Similar Threads

  1. One way to fix lens separation
    By jack_hui in forum Lenses & Lens Accessories
    Replies: 30
    Last Post: 11-Sep-2016, 17:45
  2. lens separation help
    By lenser in forum Lenses & Lens Accessories
    Replies: 9
    Last Post: 24-Apr-2012, 12:32
  3. The BEST way to solve lens separation
    By ic-racer in forum Lenses & Lens Accessories
    Replies: 6
    Last Post: 14-Jan-2012, 10:09
  4. Rodenstock lens separation
    By Patrick Dixon in forum Lenses & Lens Accessories
    Replies: 68
    Last Post: 12-Oct-2010, 18:59
  5. Lens Separation
    By Bill_1856 in forum Cameras & Camera Accessories
    Replies: 2
    Last Post: 14-Jun-2006, 15:33

Bookmarks

Posting Permissions

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