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  1. #1

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    Coverage area of a lens

    This is probably a very silly question....

    What determines the maximum coverage of a particular lens? Is it design of the lens? Is it focal length of the lens? Is it the distance between the lens and the film?

    The reason I ask is that I am starting to collect a bit of junk camera body and lens... from 35mm to MF to enlarger lens. If I wanted to play with these and say, make a panorama shooter, projecting to 120 film, how should I logically approach the lens selection?
    Develop, stop, fix.... wait.... where's my film?

  2. #2

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    Yes, I am very bored today.... have been sick at home for few days.
    Develop, stop, fix.... wait.... where's my film?

  3. #3

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    That’s mainly determined by the design. For example, a 150/5.6 Nikkor W covers the 4” x 5” format, while the 150/8 Nikkor SW covers the 8” x 10” format.

    You have to choose a lens based upon the coverage it has. It can’t be changed.

  4. #4
    Ian Grant's Avatar
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    Purely design & physical constraints. The head (lens cells) of an older Leitz 35mm telephoto lens actually covers 5x4.

    Ian

  5. #5

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    Thank you Ian 1 and Ian 2.... DARN!
    Develop, stop, fix.... wait.... where's my film?

  6. #6

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    In a related question- does the diameter of elements necessarily have any effect on coverage? I've heard that the 40/2.8 Sonnar that came with the Rollei 35RF (recent Voightlander clone) is optically the same as the Sonnar in the old Rollei 35 S/SE- yet the diameter of these elements is vastly different.

  7. #7
    Steve Smith's Avatar
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    Have a look at my home made 6x12 camera link (below). Doesn't answer your question but you did say you were bored!


    Steve.
    "People who say things won't work are a dime a dozen. People who figure out how to make things work are worth a fortune" - Dave Rat.

  8. #8

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    More specifically, I guess the optical formula and physical constraints determine the coverage *angle*, and the coverage *area* then grows in proportion to the focal length, right? Which is why it's hard to build a wide-angle lens with large coverage.

    -NT
    Nathan Tenny
    San Diego, CA, USA

    The lady of the house has to be a pretty swell sort of person to put up with the annoyance of a photographer.
    -The Little Technical Library, _Developing, Printing, And Enlarging_

  9. #9

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    I know one excellent camera repair guy. He once told me that he had made a device to compare the image circle of Leica and Nikkor lenses and found that whereas the Nikkors barely covered 35mm film, the Leica's covered almost 60x60mm. By using the best portion of their image circle, the Leica's were much sharper than the Nikkors, he claimed.

  10. #10

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    Thanks but that's not fair! You have access to a nice CNC machine!! Very nicely done!!!

    Quote Originally Posted by Steve Smith View Post
    Have a look at my home made 6x12 camera link (below). Doesn't answer your question but you did say you were bored!
    Steve.
    Develop, stop, fix.... wait.... where's my film?

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