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Thread: Angle of View

  1. #1

    Join Date
    Nov 2013
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    Angle of View

    I took some measurements from a Rodenstock 240mm Sironar S, I have.

    I am trying to understand how much distance I will have in the frame of an 8x10 camera, Landscape.

    The specs for the lens state an Angle of coverage of 75 degrees.

    I took the camera out and took some measurements:

    Lens to Subject = 9ft

    Landscape width measured = 8ft 3in

    to my Calculations this gives an Angle of Coverage of 50 degrees, not 75...

    Is my missing connection, focused at infinity?

    Neil.

  2. #2
    Joel Edmondson
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    Dec 2008
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    Yatesville, Georgia
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    Re: Angle of View

    Hard to tell from the information given... are you confusing angle of view and angle of coverage?

    Joel

  3. #3
    8x10, 5x7, 4x5, et al Leigh's Avatar
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    Maryland, USA
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    Re: Angle of View

    I don't understand your question.

    The published image circle for the 240/5.6 APO-Sironar-S is 372mm.

    Is that your lens, or do you have a SINARON-S ?
    This was a Sinar-branded Rodenstock Sironar-N lens. Its image circle is 340mm.

    Both image circles are at infinity and f/22.

    - Leigh
    If you believe you can, or you believe you can't... you're right.

  4. #4
    Resident Heretic Bruce Watson's Avatar
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    Re: Angle of View

    http://www.largeformatphotography.in...e-focal-lenght

    See my answer #9 in the above thread.

    Bruce Watson

  5. #5

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    Re: Angle of View

    Quote Originally Posted by Bruce Watson View Post
    http://www.largeformatphotography.in...e-focal-lenght

    See my answer #9 in the above thread.
    Very good thank you.

  6. #6

    Join Date
    Jan 2011
    Location
    Edmonton, Alberta, Canada
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    303

    Re: Angle of View

    Image circle 372mm & 240mm FL = 75.55 degrees coverage, as claimed.
    "...with the grandeur of true simplicity", Patrick White, "The Tree of Man".

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