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Thread: Coating Lenses

  1. #11
    Denis P.'s Avatar
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    I have also had a Summicron front element recoated by Arax.
    Like others said, their service was impeccable - the lens came back coated better than when it left the Leitz factory back in 50-ies... i.e. multi-coated!

    Alas, Arax does not offer such service any more.

    The info about Longman Optical is a very welcome news indeed!

  2. #12
    Ian Grant's Avatar
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    Balham Optical in London also re-coat lenses but are much more expensive.

    Ian

  3. #13
    David A. Goldfarb's Avatar
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    There is a company called Superflat that recoats lenses for the cine industry, but as I recall, you have to disassemble the lens and send them the elements.
    flickr--http://www.flickr.com/photos/davidagoldfarb/
    Photography (not as up to date as the flickr site)--http://www.davidagoldfarb.com/photo
    Academic (Slavic and Comparative Literature)--http://www.davidagoldfarb.com

  4. #14

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    Just a personal opinion, but I feel the beauty of the Eurynar is the fact that it is not coated
    Mark
    Mark Layne
    Nova Scotia
    and Barbados

  5. #15
    Ian Grant's Avatar
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    You may be right Mark, but I'll test it first. I've been shooting with an uncoated Tessar and want a slight increase in quality, the Eurynar is far easier to get coated should then give a contrast closer to a modern lens, also far less prone to flare.

    I also have another uncoated Rodenstock 135mm lens so that leaves me options for that 30's rounded tone look.

    Ian

  6. #16
    sun of sand's Avatar
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    Has anyone ever thought of contacting JML Optics? They've made good lenses themselves so seems like a quality place to try
    I believe I read somewhere on their site their founder was an old Ilex guy

    They have a coatings section and it appears to say MgF2 coating for a smaller diameter lens would be in the $25 per surface range
    but I could be misreading that totally

    http://www.jmloptical.com/level2/ind...tive_info.aspx

    You can see their setup and process on a lens making Youtube video

  7. #17

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    Hi !
    Seing this, and having tried to have re-coated a front lens damaged on cleaning, I thought it could be of some help.
    Alas, an optic teacher I know said to me "Single layer MgF2 coating ? It is a circa 1935 technique. Not so good by today standard."
    So, it could be good for an uncoated lens, but do not expect tremendeous results.... if I understand what this guy said to me.

  8. #18
    Ian Grant's Avatar
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    Georges, single layer coating can be excellent, modern methods have improved significantly since their first invention and early techniques.

    Sure it's not going to be as good as Multi-coating on a modern lens but equally many companies say that multi-coating isn't particularly beneficial to older pre-war lenses anyway and doesn't give the improvements you expect and can take the edge of sharpness etc, and single coating is sufficient.

    Ian

  9. #19
    JPD
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    The difference between single- and multicoated lenses with six or eight surfaces is hardly noticable. Modern single coating can reduce the internal lens reflections by 90% or more.

  10. #20
    JPD
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    I'm waiting for another Eurynar 4,5/13,5cm. Hopefully it's in better condition than the one I already have ("cleaning marks"). The Eurynar is easy to take apart, which is great if I decide to have the elements coated.

    I'm also waiting for a Goerz Dogmar 6,3/135mm It should be good, as it is Goerz improved version of the Celor. Still a dialyt, but not as symmetric as the Celor.

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