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

Subject: [OM] Re: Manufacturers tests published, of their own lenses
From: Johnny Johnson <jjohnso4@xxxxxxxxxx>
Date: Sat, 21 Jan 2006 14:43:41 -0500
At 02:27 PM 1/21/2006, Winsor Crosby wrote:

>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.

Photodo <http://www.photodo.com/prod/lens/alllensesmtf.shtml> 
publishes MTF charts showing the results of actual tests and there 
are, at least with a couple of lenses, significant differences 
between their data and Canon's.  I don't think that they cherry 
picked samples for their tests so the differences might well be due 
to sample to sample variations.

Later,
Johnny

__________________________
Johnny Johnson
Cleveland, GA
mailto:jjohnso4@xxxxxxxxxx 


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