James B.Davis wrote:

But saying that you need the 85/1.2 because it's sharper at f1.8 for
portraits just doesn't make any sense to me. read_handheld_no flash_see
every pore on the skin_ wow nice lens!
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As you say, does not make any sense to you. I personally do not own a
1.o or 1.2, a 1.4 yes! The reason you buy a F1.4 is that you can use it
at F1.4, however, at F2.8 the lens is sharper as lenses improve in
resolution 2-3 stops down from wide open. If you do not understand this,
there is a book called Lenses in Photography by Dr. Rudolf Kingslake
written in 1953 or so. Kingslake was consider "the" authority on lens
design and worked for Kodak for many years.
Your comment, read_handheld_no flash_see every pore on the skin_ wow
nice lens! is a bit sarcastic,and while you are right about lens
sharpness being better on a tripod it true. However, that being said,
how about this read_tripod_no flash_small aperture_snapshot_every item
in background noticeable, must be an amateur. :-)
Peter K
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