Question about Schneider 210mm f/5.6 Apo-Symmar Lens with Copal Press 1 Shutter

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SCHNEIDER SYMAR-S 210MM 1:5.6 LARGE FORMAT VIEW LENS

Well that is close. Problem is white spots on the surface of the black coating around the perimeter of the front lens. I have the front lens out of the assembly. The coating looks fine on the outside but looking through the lens I see a lot of white spots on the black coating.
I am told it is called the Schneider effect.
Can it be fixed? I do have a picture of the spots.
Kind Regards
Ed Moon europabase@hotmail.com

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Hello aPaulK.

The phenomenon is due to voids/defects in the paint on the edge of the lens. Although the spots will not affect your image, it could be corrected. This is more of a cosmetic rather than a functional problem. The repair will require disassembly and removal of all elements, stripping the old black edge paint, repaint the element edges and reassemble/adjust all functions. Repainting involves applying a good adhereing opaque black paint to the angled ground edge of the element. This is done at the factory by skilled workers using a potters wheel sort of thing and applying the paint with a brush as the element is spun at about 100 rpm. It takes a lot of practice to get this right and its not a simple matter of "what's the secret paint?"

If you do manage to disassemble the piece, you can clean the lens with methylated spirit, which can remove the fungal growth, if present..

Hope that helps! Should you have any further questions, please feel free to post them here.

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IrishDruid

Posted on May 04, 2008

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Its just dust

Posted on May 04, 2008

  • dewan nafees ahmed May 04, 2008

    else it must be cleaned using some cleaning solution..

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