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  1. #1
    Mustafa Umut Sarac's Avatar
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    C P Goerz AG Dagor f= 30 cm 1:6,8 and f=36 cm 1:7,7 Design Paper

    Zeiss Archive paper , only Goerz paper remained in all Zeiss Archive. Find attached paper.

    By the way , It would be very nice to see images and pictures of above lenses If there is any owner one of these lenses.

    Umut
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    Last edited by Mustafa Umut Sarac; 08-29-2013 at 07:04 AM. Click to view previous post history.

  2. #2
    Mustafa Umut Sarac's Avatar
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    Last edited by Mustafa Umut Sarac; 08-29-2013 at 11:08 AM. Click to view previous post history.

  3. #3
    Mustafa Umut Sarac's Avatar
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    Last edited by Mustafa Umut Sarac; 08-29-2013 at 11:01 AM. Click to view previous post history.

  4. #4

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    I have the 30cm f:6.8, a late one #657010. Thank you for finding this!

  5. #5
    Mustafa Umut Sarac's Avatar
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    Hello E. von Hoegh,

    Can you please share your best quality shots for evaluating the lens,

    Thank you.

  6. #6

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    Quote Originally Posted by Mustafa Umut Sarac View Post
    Hello E. von Hoegh,

    Can you please share your best quality shots for evaluating the lens,

    Thank you.
    I'm sorry, I have no way to scan negatives at anything approaching the quality neccesary to evaluate the lens' performance.
    But I can say I've been using it for about 20 years, with b&w and some color transparency - Kodachrome 64 in 120 size for product photography, in the studio - and it's a superb example of a Dagor.

  7. #7
    Mustafa Umut Sarac's Avatar
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    I am attaching the above paper for APUG malfunction. My two attached images of lenses have been crashed in 3 hours , I dont know why ?

    Here is the same paper again attached below.

    Umut
    Attached Files

  8. #8
    Mustafa Umut Sarac's Avatar
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    Thank you, no problem , Someone had been asked at an another forum that can he evaluate an Stradivari from mp3. No ! But however I can discriminate Leica shots at the gallery. Difference is more than the difference of compression IMHO.

    From that view , anyone is welcome to put her his images. These last articles is my crusade againts the science and practice of lens design.
    New books are tragedy. They are extremelly expensive and each others copies.

    Von Hoegh , You remember my last post on Leica secret , you put interesting post , can you shed more light on some lens elements and their select high aberrations as a tool of low contrast unsharp mask ?

    Thank you.

  9. #9

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    Here you go Mustafa, the US patent #528155 for the Dagor. Note the two constructions covered, the one on the right is known as the "reverse Dagor" - also used in the Zeiss Doppel Amatar and the Schneider-Kreuznach Angulon.

    http://ip.com/pat/US528155 You have to click on the "download" box and enter a captcha code.

  10. #10
    Mustafa Umut Sarac's Avatar
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    Thank you. US patent 528155 is dated from 1894. I will read it and comment.

    I attached that pdf patent file herebelow.
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