Re: Newbie to 5D MKII and Nikkor 10.5mm. Awful pictures.
- --- In PanoToolsNG@yahoogroups.com, Wim Koornneef <wim.koornneef@...> wrote:
>This depends on if you really want to use the last part and shoot only 3 images.
> 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.
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.
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