On 19 March 2014 08:04, Pawel Rozenek wrote:
> [snip]
> http://www.rozenek.com/images/forum/hugin-problem.jpg
>
> It is NOT a problem with my bracket, because I designed a special bracket 
> just for my camera:
> http://www.rozenek.com/a-new-version-of-the-panoramic-bracket-for-my-camera/
> so I have got a perfect nodal point.

Just a two quick remarks:
If you are using a fisheye lens (but rectilinear one as well) then
there is no such thing as a perfect nodal point:
the 
http://michel.thoby.free.fr/Fisheye_history_short/Entrance_Pupil_Shift_on_real_lenses.html

In my experience the errors that you observe are mainly due to either
not optimising for d,e (which should even be done if you have a good
lens profile due to play in the mount) or caused by an insufficient
spread of control points.

Regards,
Felix

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