Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!ucbvax!hplabs!hp-pcd!hpcvlx!ben
From: ben@hpcvlx.HP.COM (Benjamin Ellsworth)
Newsgroups: comp.graphics
Subject: Re: A Question of Perspective (?)
Message-ID: <350002@hpcvlx.HP.COM>
Date: 24 Jun 88 00:51:14 GMT
References: <350001@hpcvlx.HP.COM>
Organization: Hewlett-Packard Co., Corvallis, OR, USA
Lines: 37


First, I want to thank everyone who has taken the time to answer my
question.  I both got the answer that I needed, and education in some
areas that I found interesting.

Now we get to the good part...

.. the answer is...

------DRUM ROLL-----

OK, ok, just give me a moment to wipe the egg off of my face.

	30" or 2.5' 

Award for simplest derivation going to similiar triangles (recipients
too numerous to mention).

Award for best clarifying example to Jack C. Morrison

	"... Note that you could look at a solar eclipse with a wide-angle
	or telephoto lens, but the moon would always cover the same area
	as the sun. (kids, don't try this at home :-)"

This is the answer for the problem that I am trying to solve.  I
received answers for other problems, and from them I learned alot.

Alas, I fell prey to curse of the over-educated, looking for a hard
answer to a simple question.  I had considered similiar triangles, but
dismissed them as being too simple.  Surely the focal length of the eye
came into play somewhere!

Until my next major brain failure,

Benjamin Ellsworth
ben%hpcvlx@hplabs.hp.com
	or
{ backbone }!hplabs!hpcvlx!ben