84 lines
4.2 KiB
Plaintext
84 lines
4.2 KiB
Plaintext
SUBJECT: A NEST OF INFO ON GULFBREEZE UFOs FILE: UFO1648
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PART 34
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Message #5474 - INFO.PARANET
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Date : 10-Nov-91 2:12
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From : John Hicks
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To : all
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Subject : Hyser report
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Here's the scoop on the Hyser report (so far).
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Rex Salisberry says he has a copy of William Hyser's report on some of Ed
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Walter's photos but can't release it to us yet because of a committment he
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made to Hyser to not release the report without his (Hyser) permission.
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Jerry Black sent a copy to Phil Klass, and Phil quoted a little of it in his
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newsletter. Rex said Hyser went through the roof.
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Anyway, the gist of the report is that Hyser found quite a few things in the
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photos that were *consistent with* multiple exposures, but nothing that
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constituted *proof* of multiple exposures.
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I think we've already discussed most of those items and picked the photos
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apart, but of course we don't have any clout so we don't really count. ;-)
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Also, in the October 1991 _Photomethods_, (a journal for commercial/
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industrial photographers) Hyser went through an example of how to do a
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multiple exposure and have the object appear to be behind another darker
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object. The example was a ufo behind a church steeple at night (surprise!)
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Anyway, he presents the idea of the film's threshold sensitivity as being
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the key to having a foreground object appear black against a slightly light
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object.
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Look at Ed Walter's photo #1, in which we see a ufo behind a tree branch.
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Keep that in mind.
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Now I'll walk through the threshold sensitivity thing, in plain English. In
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the graphic arts and photolab industries, the process is called flashing, so
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you guys familiar with that stuff will now already know what I'm talking
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about.
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Photographic film (paper etc.) requires a minimum amount of light for an
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image to "stick." For example, let's say the threshold is five photon (units
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of light). If the film receives only four photons, they'll most likely
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dissipate before you develop the film. If the film receives more than five
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photons, they "stick" and you have a latent image (waiting to be developed).
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So, an area of film that receives only four photons will be black (clear)
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and an area that receives six photons will have density.
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Listen closely now.....
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A ufo model is first photographed against a black background, and is exposed
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just below the threshold, say, just under five photons. If you were to develop
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the film, you'd see no image.
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*But* you make a second exposure on the same sheet of film. The second
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exposure consists of a black tree and an illuminated skyline. You make this
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exposure slightly underexposed.
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Where the tree overlaps the ufo, the film doesn't receive any additional
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light, so you have a total exposure still of just under five photons; no
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image. The combination of the skyline *and* the ufo below-the-threshold image
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make up more than five photons, so not only do you have the skyline image,
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you've kicked the ufo image over the five-photon threshold too; you have an
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image of a ufo against a skyline, with a (black) tree that appears to be in
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front of the ufo.
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*But* such a multiple exposure isn't without artifacts. The very dark image
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of the ufo will tend to take on the colors of the background. Sort of a
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chameleon effect.
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Also, to heighten the contrast between the ufo image and the skyline, you
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can develop the film for a longer time (Polaroid 108 too).
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Now, take another good close look at the Ed Walters photos......
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My opinion? (since you didn't ask)
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This process is certainly workable, and wouldn't be anywhere near as
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cumbersome as masking techniques in the darkroom, then printing onto Polaroid
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etc. But it'd be hard to control. But certainly workable.
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I think we have another valid hoax theory. Not proof, but a theory that can
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explain photo #1.
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William G. Hyser is a consultant in optical instrumentation, photogrammetry,
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forensic engineering, electrical contact physics and illumination engineering.
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Perhaps best of all, he's not a ufologist.
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jbh
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---
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* Origin: Moderation? What's that? -*- Fidonet UFO Moderator (1:363/29)
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**********************************************
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* THE U.F.O. BBS - http://www.ufobbs.com/ufo *
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********************************************** |