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[OM] Diffraction Lenses

Subject: [OM] Diffraction Lenses
From: Winsor Crosby <wincros@xxxxxxxxxxx>
Date: Thu, 29 Jan 2004 09:38:24 -0800

I was alert enough to notice that Canon was flogging something called a 
diffraction element telephoto some time ago, but did not pay much 
attention. I was flabbergasted when they just announced their new 
70-200 zoom with diffraction elements that enable a length of less than 
4 inches at the 70mm end of the zoom.

Anyone know how a diffraction lens works?


Winsor
Long Beach, California
USA


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