http://tinyurl.com/3knmf8m
Explains a few things as to why some Zeiss lenses don't always test
well. I am not a Zeissoholic by any means but some Zeiss appears
penalized for choosing to better correct other aberrations rather than
field curvature. There are always compromises of course and one wants
a lens that excels at its intended use rather than scoring well on a
flat target. (OK, they may have their own ax to grind) A fixed flat
target at a modest distance can only tell so much. Targets at various
distances and rendering of 3D targets should be assessed. The current
testing schemes seem very arbitrary, idiosyncratic and inconsistent and
certainly difficult to compare across testing sites.
I pinged Dr. Nasse about a crummy score on Photozone, and he actually
took the time for a detailed explanation.
Mike
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