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Location: UFOUpDatesList.Com > 2005 > May > May 20

Re: Google Maps Captures UFO? - Shell

From: Bob Shell <bob.nul>
Date: Thu, 19 May 2005 10:24:17 -0400
Fwd Date: Fri, 20 May 2005 07:50:09 -0400
Subject: Re: Google Maps Captures UFO? - Shell


>From: Don Ledger <dledger.nul>
>To: ufoupdates.nul
>Date: Wed, 18 May 2005 13:11:59 -0300
>Subject: Re: Google Maps Captures UFO?

>Usually crosshairs or right angled marks
>- reticles or graticules, Latin or Fr. - are scribed right into
>a thin glass between lenses. Note Lunar photos, etc.

The crosshairs seen on the lunar photos and others are marked on
a flat glass plate, called a reseau plate, which is right in
front of the film and pressed against the film by spring
pressure during the exposure. Reseau plates are used on metric
cameras (mapping cameras) and are not reticles or graticules.
 Reseau plates are never between lenses! If they were, there
would be no focused image of them on the film.

A digital mapping camera would have the + marks on a glass plate
in front of (and in contact with) the digital sensor array.
 This would produce sharp + marks, just as on a film camera.

Personally, I think we're seeing some sort of high-altitude
balloon, or balloons. The soft focus is because the balloon is
much closer to the camera and outside of its field of sharp
focus. We'd need to know the focal length of the lens, lens
aperture, and sensor size to compute what the depth of field
would be.

Bob Shell




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