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Re: [PanoToolsNG] NP 200 and 300mm Canon

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  • bigwade
    When I see this: http://www.youtube.com/watch?v=D1EOJr11bvo&fmt=18 the camera is mounted the wrong way according to the replies. At that distance with a
    Message 1 of 32 , Feb 1, 2009
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      When I see this: http://www.youtube.com/watch?v=D1EOJr11bvo&fmt=18
      the camera is mounted the wrong way according to the replies.
      At that distance with a painting I guess it doesn't matter that much, is it
      ?




      Erik Krause wrote:
      >
      > erik leeman wrote:
      >
      >> It could also mean that if the NPP is reasonable far behind the
      >> camera, the entire camera should move along a radius. If that radius
      >> is large enough it would come close to a straight line.
      >
      > It is a straight line, if the lens is of the telecentric type. In this
      > case the NPP is an infinite distance behind the camera. This lenses
      > exist in reality and they have some weird properties. They are f.e. used
      > by Rik Littlefield for focus stacked macro photography:
      > http://www.photomacrography.net/forum/viewtopic.php?t=1032
      > and for the theory of the NPP (which permits this):
      > http://www.janrik.net/PanoPostings/NoParallaxPoint/TheoryOfTheNoParallaxPoint.pdf
      >
      >> Isn't that what some people want when they are photographing a mosaic
      >> of a large flat surface like a painting? I think I read somewhere
      >> that in theory the NPP could even be at infinity behind the camera.
      >
      > Not only in theory. The downside and the reason why this is limited to
      > macrophotography is, that the area of view of such a lens can't be
      > larger than the lens diameter - naturally, if you think about it: if
      > the entrance pupil is infinitely behind the camera the lens must not
      > limit the rays.
      >
      > More info (and how to make one): look for the telecentric articles on
      > Rik's link page: http://janrik.net/RiksLinks.html
      >
      > --
      > Erik Krause
      > http://www.erik-krause.de
      >
      >
      > -----
      > Erik Krause
      > http://www.erik-krause.de
      >

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    • bigwade
      Hey, Hey.. reshoot of course.. with a very wrong NNP it can be an issue at 2 meters. ... -- View this message in context:
      Message 32 of 32 , Feb 2, 2009
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        Hey, Hey..
        reshoot of course..
        with a very wrong NNP it can be an issue at 2 meters.


        Matthew Rogers-2 wrote:
        >
        > So you want to combine the shots taken at 100mm with the new ones
        > taken at 200mm ? Or do you simply want to reshoot the entire image at
        > 200mm. Either way I still dont see where the parallax issues can occur ?
        >
        >
        >
        > Matt
        >
        > On 2 Feb 2009, at 23:38, bigwade wrote:
        >
        >>
        >> Maybe I'm not clear enough.
        >> First I want to shoot a landscape shot with client in the studio.
        >> Lighting and settings are oké.
        >> Let's say at 100mm.
        >> But the client wants higher resolution.
        >> So I rotate the camera to portrait, zoom in to 200 and make more
        >> shots.
        >> (even with different focussettings to combine in Helicon or whatever)
        >> Parallax will be an issue unless you have big overlap and a lot of
        >> shots.
        >> (BTW the beer will be dead by then.:-)
        >>
        >
        >
        >
        >

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