Am 30.11.2012 00:42, schrieb Greg 'groggy' Lehey:
I seem to be having difficulty making myself clear.  My apologies.  To
spell it out:

- The Olympus 8 mm lens, designed for Four Thirds sensors (21.63 mm
   diagonal), covers an angle of 180° along this diagonal.

- The Samyang (I think that's the original manufacturer), also 8 mm,
   covers an angle of 139.3° along this same diagonal.

And as I said, the difference in angle can't be explained by
distortion alone.

The Samyang follows a different mapping, where the outer regions are not compressed that much:
http://michel.thoby.free.fr/SAMYANG/Early%20test%20report.html

--
Erik Krause
http://www.erik-krause.de

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