At 18:13 1/29/00 , Gary Reese wrote:
>I'm pondering what to do about that one. The subject magnification in a
>fisheye is variable, depending on the distance from the center of the
>frame and my evaluation methodology used with other Zuikos maybe
>invalid here. The center looks GREAT, but is it PARTLY due to the
Hmmm, I've wondered how one would test a fisheye. How are you going to get
a flat map big enough for the 8mm <g>?
More seriously, would a test method using the inside of a spherical
surface, the radius of which is distance to the rear lens node (maybe one
mapped to a flat plane) be more valid? If I understand it right, isn't
that what a theoretical fisheye does? Map spherical surfaces in space to a
flat one on the film? Like a polar projection (equidistant azimuthal) map
maybe?
Just some random thoughts.
-- John
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