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Location: UFOUpDatesList.Com > 2002 > May > May 7

Re: Roswell Vs. The Critics - Huthinson

From: Bruce Hutchinson <bhutch@grassyhill.com>
Date: Tue, 7 May 2002 11:55:22 -500
Fwd Date: Tue, 07 May 2002 14:29:23 -0400
Subject: Re: Roswell Vs. The Critics - Huthinson


 >From: Ed Gehrman <egehrman@psln.com>
 >To: <ufoupdates@virtuallystrange.net>
 >Date: Mon, 6 May 2002 15:40:19 -0700
 >Subject: Re: Roswell Vs. The Critics


Ed, Dave, Andrew- List and Readers,

 >How about just finding one that we can all agree measures 34
 >inches. That could be a good start. I don't see one yet. Please
 >point it out

I know Ed, Dave and others have put in some serious effort in
determining the dimensions of the debris in the FW photos. Part
of the effort has been determining a base dimension that all can
agree on. Unfortunately, I don't think that using any item in
the photos as a baseline will yield accurate results.

Look at the Ramey photo, and the radiator in the back-left of
the frame. Notice the distortion? The radiator appears to be
warped and leaning to the left, as does the frame of the window.
Yet the chair leg (next to Ramey's left knee) is perfectly
straight. A wide- angle lens on the Speed Graphic camera that
Bond used caused this optical distortion. I am not conversant on
the lenses used for a Speed Graphic, but I would judge the focal
length of the one Bond was using would be the equivalent of a
28-30mm lens for a 35mm Camera.

A wide-angle lens of this focal length will cause a considerable
amount of distortion of the apparent dimensions of the items in
question. Using the radiator as a baseline, for example, would
be useless in determining the length of any of the struts.
Adjusting for perspective will still not yield accurate results,
because the lens has grossly altered normal perspective. A
perspective correction would only be valid if the photo had been
taken with a "normal" focal length (the equivalent of a 50-55mm
lens for a 35mm camera).

This can be demonstrated easily enough by scattering some
yardsticks in roughly the same pattern then taking a picture
with a 28mm lens.

Has any effort been made to determine what focal length lens
Bond used, and/or to correct for the wide-angle lens distortion?
Input from Bruce Maccabee would be useful here.


Regards,

Bruce Hutchinson




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