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Re: [PanoToolsNG] arithmetic

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  • Keith Martin
    ... What coverage percentage in the viewfinder? Many only give 95% or so. k
    Message 1 of 7 , Nov 3, 2009
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      >an 8mm fisheye on a 22.5 x 15 sensor

      What coverage percentage in the viewfinder? Many only give 95% or so.

      k
    • crane@ukonline.co.uk
      ... Erik get 20 points and an extra 10 for using the word reality (what s wrong with reality(tm)) cheers mick ... This mail sent through
      Message 2 of 7 , Nov 3, 2009
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        Quoting Erik Krause <erik.krause@...>:

        > crane wrote:
        >
        > > I was trying to work out how much of what I see in the viewfinder will
        > > be in a cubeface.
        > > does that look right ? an 8mm fisheye on a 22.5 x 15 sensor
        > >
        > > http://www.panagito.com/MISC/photo01.jpg
        >
        > Yes.
        >
        > > extra points for posting the calculation.
        >
        > Since standard fisheye in a first approximation maps an angle in reality
        > to a distance on the sensor you can simply use the sizes as you did in
        > your draft. If the fisheye shows 170° on 22.5mm it will show 90° on
        > 11.9mm (22.5*90/170 or 15*90/113.34).

        Erik get 20 points and an extra 10 for using the word reality (what's wrong with
        reality(tm))

        cheers

        mick


        > best regards
        > --
        > Erik Krause
        > http://www.erik-krause.de


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      • crane@ukonline.co.uk
        ... 2 points ... This mail sent through http://www.ukonline.net
        Message 3 of 7 , Nov 3, 2009
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          Quoting Keith Martin <keith@...>:

          > >an 8mm fisheye on a 22.5 x 15 sensor
          >
          > What coverage percentage in the viewfinder? Many only give 95% or so.

          2 points



          > k


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        • panostar
          ... Using PTGui rather than maths, the view should look more like: http://www.johnhpanos.com/sig8cube.jpg John
          Message 4 of 7 , Nov 4, 2009
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            --- In PanoToolsNG@yahoogroups.com, crane@... wrote:
            > I was trying to work out how much of what I see in the viewfinder
            > will be in a cubeface.
            > does that look right ?

            Using PTGui rather than maths, the view should look more like:

            http://www.johnhpanos.com/sig8cube.jpg

            John
          • crane@ukonline.co.uk
            ... 15 points but no extra. It does look very small when drawn accurately. cheers mick ... This mail sent through http://www.ukonline.net
            Message 5 of 7 , Nov 4, 2009
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              Quoting panostar <j.houghton@...>:

              > --- In PanoToolsNG@yahoogroups.com, crane@... wrote:
              > > I was trying to work out how much of what I see in the viewfinder
              > > will be in a cubeface.
              > > does that look right ?
              >
              > Using PTGui rather than maths, the view should look more like:
              >
              > http://www.johnhpanos.com/sig8cube.jpg
              15 points but no extra.
              It does look very small when drawn accurately.

              cheers

              mick

              > John


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