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Re: Newbie to 5D MKII and Nikkor 10.5mm. Awful pictures.

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  • Hans
    ... This depends on if you really want to use the last part and shoot only 3 images. To get the Nikkor 10,5mm to stitch also at the zenith you need a high
    Message 1 of 7 , Apr 8, 2010
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      --- In PanoToolsNG@yahoogroups.com, Wim Koornneef <wim.koornneef@...> wrote:
      >
      >
      > Hello Andrew,
      >
      > I read that you solved the focus issue, the images are now sharp again and
      > you are ready to go :-)
      >
      > Just a small tip, when working in PTGui, when you have to set CP's manually
      > don't put them to close to the circle crop, set them not closer then at
      > approx. 175 degree, so at a little distance from the crop circle.
      >
      > The reason is this, the image mapping of the Nikon 10.5 is a little
      > different from most other fisheye lenses and the image part very close to
      > the crop circle is much more compressed, when you set CP's in this very
      > compressed region then PTGui will calculate huge lens correction parameters
      > and this can introduce errors at the seems.

      This depends on if you really want to use the last part and shoot only 3 images.
      To get the Nikkor 10,5mm to stitch also at the zenith you need a high level of correction for the a correction and the best way to do it is to set a at -0.16 and just leave it there without optimizing it in PTGui.

      Also make sure you do not optimize for c if you take 4 images or more.
      It might give you a pincushion distortion at the centre.

      Hans



      >
      > Success,
      > Wim
      > --
      > View this message in context: http://n4.nabble.com/Newbie-to-5D-MKII-and-Nikkor-10-5mm-Awful-pictures-tp1754801p1763758.html
      > Sent from the PanoToolsNG mailing list archive at Nabble.com.
      >
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