Hallöchen! Erik Krause writes:
> [...] > > This is most significant for fisheye lenses. The popular Samyang > 8mm lens f.e. is even marketed as different focal length. You only > can give an approximate value after you estimated the mapping > formula: > http://michel.thoby.free.fr/SAMYANG/Early%20test%20report.html I performed a quite nice test with my Samyang 8mm f/2.8. If I assume stereographic projection, I get focal length = 8.04 a = 0.02036 b = -0.08028 c = 0.01446 ==> real focal length = 8.41 However, assuming full-frame fisheye, the same control points yield focal length = 8.65 a = 0.02142 b = -0.0194 c = 0.02785 ==> real focal length = 8.39 I think this supports my view that Hugin's focal length, multiplied by (1-a-b-c), results in the real one. Tschö, Torsten. -- Torsten Bronger Jabber ID: [email protected] or http://bronger-jmp.appspot.com -- A list of frequently asked questions is available at: http://wiki.panotools.org/Hugin_FAQ --- You received this message because you are subscribed to the Google Groups "hugin and other free panoramic software" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/hugin-ptx/87ha63k6y6.fsf%40physik.rwth-aachen.de. For more options, visit https://groups.google.com/d/optout.
