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[OM] Re: Manufacturers tests published, of their own lenses

Subject: [OM] Re: Manufacturers tests published, of their own lenses
From: Winsor Crosby <wincros@xxxxxxxxxxx>
Date: Sat, 21 Jan 2006 11:27:12 -0800
I am not sure how that would be done, but if they have a mathematical  
formula for predicting  their lens performance, then the question  
would be whether it is close to what you would actually get from one  
of their lenses. How they do it is not as important as the question  
of how acccurately minimum performance is represented. It could be  
more accurate prediction than picking a lens off of the line, or  
cherry picking, and actually measuring it.



Winsor
Long Beach, California, USA




On Jan 21, 2006, at 10:56 AM, Johnny Johnson wrote:

> The word on the Internet is that the Canon MTF charts are
> theoretical, based on calculations, and not based on actual tests.


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