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Re: [OM] Are these teles any good?

Subject: Re: [OM] Are these teles any good?
From: Gary Edwards <edwardsg@xxxxxxxxx>
Date: Sat, 29 Jan 2000 21:10:08 -0600
Here's how, Gary..... Get yer 8 mm, lots of Grand Canyon maps, a jar of paste,
and head for the nearest Omnimax Dome......

Gary Edwards <g>

"John A. Lind" wrote:

> 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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