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Thread: 508mm f/7 ILEX lenses

  1. #21

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    Re: 508mm f/7 ILEX lenses


  2. #22
    Les
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    Re: 508mm f/7 ILEX lenses

    Allow me to add to this frey, what would be the bellows length for this 508mm ? I did see "Acutar" on the fleebay and it's rather spendy.

    Les

  3. #23

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    Re: 508mm f/7 ILEX lenses

    Quote Originally Posted by Leszek Vogt View Post
    Allow me to add to this frey, what would be the bellows length for this 508mm ? I did see "Acutar" on the fleebay and it's rather spendy.

    Les
    Long. It is a 500 mm lens of normal construction, will want ~ 500 mm extension to focus to infinity. Closer will need more.

    Spendy? Asking isn't getting.

  4. #24

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    Re: 508mm f/7 ILEX lenses

    Dan, i think we all know that you do your homework. And I, for one, appreciate the fact that you share the hard-earned knowledge.

  5. #25

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    Re: 508mm f/7 ILEX lenses

    Quote Originally Posted by cowanw View Post
    Thanks for the post of the Calumet catalog
    On page 30:
    L-120 500mm Caltar (20") f/6.3 Acme M/X $330.00
    interesting... have never come across or even heard of this version of a 500mm Caltar.

  6. #26

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    Re: 508mm f/7 ILEX lenses

    Pretty sure that is a misprint and the copy editors just got into the rhythm of 6.3 and forgot the 500mm was the exception at f7.

  7. #27

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    Re: 508mm f/7 ILEX lenses

    Quote Originally Posted by cowanw View Post
    Pretty sure that is a misprint and the copy editors just got into the rhythm of 6.3 and forgot the 500mm was the exception at f7.
    Or could have been a 500mm f/6.3 Bausch & Lomb Plastigmat listed in my Burke & James catalog as covering 11x14, pre Calumet outsourcing to ILEX....
    na, I think you're correct it's a misprint.
    But now will be on the lookout for a 500mm f/6.3 Bausch & Lomb Plastigmat

  8. #28

    508mm f/7 ILEX lenses

    Based on the conversation here I picked up one of the 20” f7 Ilex lenses. I can now verify that it is indeed a Tessar, not a triplet, as witnessed by the doublet rear element. This also verifies that, as is usual, Dan is correct.



    My version is branded by Calumet. Maybe this weekend I will try it out on an 11x14,

    Last edited by Jason Greenberg Motamedi; 31-Mar-2020 at 15:07.

  9. #29

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    Re: 508mm f/7 ILEX lenses

    Nicely done, thank you.
    David

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