?? 125mm Fujinon-SW f/8 (ACTUAL Focal Length) ??

Discussion in 'Large Format Cameras and Accessories' started by Old-N-Feeble, Dec 22, 2017.

  1. ic-racer

    ic-racer Member

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    It is not a retrofocus lens.

    For example the Back Focal length on the Fuji 125/8, as pointed out is 83mm. This is actually SHORTER than the back focal length of the Schneider Super-Angulon 120/8 (a shorter focal length lens!).

    In plain terms, the rear element of the Fuji 125 sits CLOSER to the film plane than the Schneider Super-Angulon 120mm.
     
  2. OP
    OP
    Old-N-Feeble

    Old-N-Feeble Subscriber

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    Oh, okay. As mentioned... I'm not well-versed in optical design. :smile:
     
  3. ic-racer

    ic-racer Member

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    In the old days people learned photography in school, now day, the internet. Its good to download the spec sheets on all your large format lenses and get to know the numbers. This wiki has explanations of the numbers, though there may be a better resource out there also: https://en.wikipedia.org/wiki/Focal_length
     
  4. E. von Hoegh

    E. von Hoegh Member

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    And the '30s CZJ 50 mm for Contaxen Collapsible Sonnar is a moderately telephoto design.
     
  5. Dan Fromm

    Dan Fromm Member

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    Yes, you're a moron. And easily led.

    Super Angulons are not retrofocus. They are more or less symmetrical. Retrofocus lenses are best thought of as inverted telephoto lenses and are quite asymmetrical.
     
  6. Nodda Duma

    Nodda Duma Subscriber

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    Yes, this is not a retrofocus design. It is a symmetrical type design (corrects aberrations by balancing the correction amongst the two lens cells in front of and behind the stop) with the rear cell having a longer focal length than the front.
     
  7. OP
    OP
    Old-N-Feeble

    Old-N-Feeble Subscriber

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    You're an intelligent person, Dan. But often not very nice. :wink:
     
  8. Dan Fromm

    Dan Fromm Member

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    True. You tossed me a big fat slow one and I just couldn't resist.
     
  9. OP
    OP
    Old-N-Feeble

    Old-N-Feeble Subscriber

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    Okay... LOL!! :D
     
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