Archived posting to the Leica Users Group, 1998/01/17

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Subject: Re: [Leica] Hoods???? Who makes square ones???
From: CHKARNES <CHKARNES@aol.com>
Date: Sat, 17 Jan 1998 20:25:51 EST

In a message dated 98-01-17 18:54:49 EST, Tom, of Baltimore, wrote:

<< 
 CHKARNES wrote:
 > 
 > <If rectangular hoods are more efficient, then so are rectangular lenses.
I can't wait to see who's first to come out with a rectangular lens with a
built-in cylindrical hood.  Perhaps it has already been tried, who knows.
 > 
 	Anamorphic lenses for 35mm motion picture photography have rectangular
 front glass, and all matte boxes used in motion picture work use
 rectangular shades...because they are better at cutting out lens flare!
 
 Tom
 Baltimore
  >>
Tom,
I didn't write that, I responded to it by saying something like "You guys
don't seem to know anything about geometry. Unless GH is kidding."

I know that rectangular shades are more efficient because, being an engineer,
I know something about geometry.
Charlie