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[OM] Re: E-1 craving

Subject: [OM] Re: E-1 craving
From: hiwayman@xxxxxxx (Walt Wayman)
Date: Fri, 11 Aug 2006 15:11:00 +0000
Consider, just for fun and for whatever it might tend to illustrate:

21/2 lens aperture diameter wide open = 10.5mm, or an opening of about 33 
square mm
180/2 lens aperture diameter wide open = 90mm, or an opening of about 282 
square mm
282 divided by 33 = 8.5
180 divided by 21 = 8.5

Anybody want to figure out if the image of a given object from a given distance 
formed by a 180mm lens just might be 8.5X the size of the same image formed by 
a 21mm lens?

Am I the only one this makes sense to?

It's all symmetrical. There ain't no voodoo involved.

Walt

--
"Anything more than 500 yards from 
the car just isn't photogenic." -- 
Edward Weston

 
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