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02-17-2008, 08:22 AM   #16
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Nice test. I see very different results compared to the Klaus test. In your sample all CAs are pritty well controled.

02-17-2008, 09:06 AM   #17
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QuoteOriginally posted by blende8 Quote
Just did a quick test to refute Klaus claim of LCA:

Please keep in mind that the term CA is defined only within the DoF.
Outside the DoF one should not speak of CAs.
Your shot shows quite a bit of Longitudinal CA.
02-17-2008, 09:13 AM   #18
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So what are the purple and green tinges in your test? Would they not show up in photos?

If that is not CA, then what exactly is it?
02-17-2008, 09:38 AM   #19
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QuoteOriginally posted by Tom Lusk Quote
So what are the purple and green tinges in your test? Would they not show up in photos?
If that is not CA, then what exactly is it?
They are CFotDoFs = Color fringes outside the DoF.

These show up with almost any lens.
Perhaps some extremely expensive Leitz or Zeiss ones are better in this respect.

Klaus needs
- a defined set-up and
- a comparison or reference to judge this.

02-17-2008, 09:40 AM   #20
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Some strong positives I found in the review

I compared some of the findings to the Canon EF 200mm f/2.8 L USM II, which is apparently an excellent lens. In terms of distortion, the DA* beat the Canon .06% versus .34%. The DA* also beat the Canon in terms of MTF (resolution) at every aperture tested, and whether it be in the center or the edge! I do realize they are tested on different cameras (8 MP 350D vs. 10 MP K10D), but I still think it is fun and possibly useful to compare.


Last edited by Tbear; 02-17-2008 at 09:58 AM.

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