Dear readers, 
I've bought a Meike circular fisheyelens 6.5 mm f2 for a MFT camera. and 
want to use it for making full spherical panorama's.
You get than partly a circle  On the long side of the sensor it is shaved 
off. FOV there ca 120 degrees.
Making 4 pictures at 90 degrees turn and in the demo of PTGUI it stitches 
perfectly.
In Hugin however I can't get it all right. 
It finds control points between the images. I did the circular crop in the 
mask tab, but optimizing gives a very bad result.

In PTGUI is the lens in te database.
It gives the following values for the Meike lens. This for the Jpeg files 
from the camera
F  theoretic          6,5 mm                     After optimizing are the 
lens parameters
Practical              6,66 mm                   a= -0,093           and 
sensor shift.
Fov degrees         181,01                       b=  0,18              d= 
-0,18%
Fisheye factor    -0,824152                 c= -0,11               e= -0,17%

What do I wrong in Hugin that I can't get a good stitch, and in the demo of 
PTGUI it works flawless.
Is it possible to "translate" the lens parameters of this from the PTGUI 
database to hugin? 
I send the PTO file after optimizing . The values of control point distaces 
are then very large.

Kind regards, Henk

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Attachment: Q7142547 - Q7142550B.pto
Description: application/ptoptimizer-script

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