Removal of haze on LF inner lens element

Discussion in 'Large Format Cameras and Accessories' started by John Snyder, Jan 9, 2009.

  1. John Snyder

    John Snyder Member

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    I have a Rodenstock 90mm/6.8 Grandagon that has moderate haze over much of one of the inner front elements. It's hard to tell exactly which surface, or surfaces, it's on. I'd like to have it removed, but I wondered if anyone who has encountered a similar problem could recommend a shop in the U.S that is experienced with such things. I assume it isn't simple to take out the elements and clean and reassemble them. (Apologies if this has been addressed before--searched for any applicable threads but didn't find any.)

    If there aren't any recommendations, I'll probably take it to Phototronics in Seattle. Any reports on their work?

    Thanks,

    John
     
  2. PHOTOTONE

    PHOTOTONE Member

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    Any good photo technician should be able to clean your lens. Disassembly and reassembly of lenses is Photo repair 101. Most, if not all technicians have specific tools to disassemble lens elements. They are available from Micro-Tools.
     
  3. archphoto

    archphoto Member

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    Are you shure it is not at the shutter-side ? > but in the front lens-section ?
    If it is at the shutterside can be removed quite easily by while holding the shutter unscrewing the entire front lens section.
    Clean with alcohol and a soft piece of cloth.
    Remounting: put the lens section onto the shutter and move it anti-clockwise untill it "falls" into place, then turn clock-wise until tight.

    Peter
     
  4. John Snyder

    John Snyder Member

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    It is most definitely within the front elements.

    John
     
  5. archphoto

    archphoto Member

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    To the repair-shop I'm afraid....
    Taking lenses apart en putting them together is a tricky job if you havn't done it before.

    Peter
     
  6. wogster

    wogster Member

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    I wonder if this could be fungus. In that case there are a couple of things to try. One is to put the lens it bright sun for a few hours, as that can kill the fungus. If that doesn't work then the lens needs to be serviced by a good technician. Hopefully if it is fungus it hasn't etched the glass.
     
  7. Philippe-Georges

    Philippe-Georges Member

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    To do it the good way, one needs a collimator to realign the elements when reassembling and a rather clean environment too.
     
  8. jonw

    jonw Member

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    Can anyone recommend someone in the US who does this type of cleaning? I have a nice 210mm Graphic Kowa lens which has this problem on the interior of its cells. If you do, any clue as to the cost for this work? Thanks. Jon
     
  9. Tomf2468

    Tomf2468 Member

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    It has been a long time, but Photography on Bald Mountain use to do this type of work. Many years ago they did a nice job on an old Wollensak for me

    http://www.baldmtn.com/AINFOSHT2.htm
     
  10. Jeff L

    Jeff L Subscriber

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    I have used Photo on Bald Mountain and he did a great job on my Super Ikonta lens and shutter. The other place I heard about was Focal Point for this type of work. I have never used them.
     
  11. Philippe-Georges

    Philippe-Georges Member

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    SK GRIMES does it very good, as I was told, AND they are an APUG sponsor and by this merit the priority...
    BTW, I think that when this kind of question is coming up, one should consult the sponsor list first "...you scratch my back, I scratch yours...".

    I hope that I did not offend somebody by stating this, but sponsoring is important for this marvellous forum to exist and an economic reality for the sponsors...

    Philippe
     
  12. Steve Smales

    Steve Smales Member

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    Does anyone know a company who can be trusted to do this work in the UK.

    I have the same problem.

    thanks

    Steve