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Location: UFOUpDatesList.Com > 2013 > Jul > Jul 30

Re: 1971 Costa Rican Photo Is Prosaic Object

From: Albert Baier <albertgbaier.nul>
Date: Tue, 30 Jul 2013 14:42:23 -0500
Archived: Tue, 30 Jul 2013 17:39:13 -0400
Subject: Re: 1971 Costa Rican Photo Is Prosaic Object


>From: Edward Gehrman <egehrman.nul>
>To: <post.nul>
>Date: Mon, 29 Jul 2013 07:27:21 -0700
>Subject: Re: 1971 Costa Rican Photo Is Prosaic Object


Ed, Bob:

1. The Haines/Vallee report did not use the original negative.
There is no provenance or chain of custody mentioned for the
copies used.

2. Focus is dependent on lens to film distance. Fixed focus
(non-zoom) lenses can be used at any subject distance, provided
the lens-to-film distance is correct.

3. Lenses for aerial photography (like the Zeiss lens used) are
designed to render images that have very low optical distortion,
so that objects can be measured accurately. Good color
correction is required so that the frequency range of the film
focuses at the same plane. They must be fast, and cover a 9" x
9" film area. This makes them expensive.

4. The object is brighter than the background, which is easy to
fake. Dark on a light background is harder, but still possible.

In view of point 1., IMO, no definite conclusions can be made,
but I lean toward the prosaic.

BTW: The frames shown in the report represent some of the worst
aerial photography I've ever seen. Surely the Zeiss RMK 15/23
is capable of better images. Something's not right here.


Albert





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