PanoTools:
Re: entrance pupil - nodal point
Erik Krause 2004-Nov-11 23:18:11
On 11 Nov 2004 at 17:55, wardnet2001 wrote:
> But here's a request. I use a Sigma 8mm. Is it possible for someone
> with the necessary knowledge to definitively state where exactly the
> point of rotation is on this lens? Someone has already mentioned the
> gold ring near the front, I use a point slightly forward of this. I
> suppose Sigma would be the best to state where this is (wonder why
> they dont).
There is no well defined point for a fisheye. See here for a diagram
how it changes with viewing angle:
http://michel.thoby.free.fr/SIGMA8mm/Alpha%20test%20300D/Graph%20Beta.
jpg
best regards
--
Erik Krause
Ressources, not only for panorama creation:
http://www.erik-krause.de/
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