Not much really, the FA has a chip that communicates more data about the
Lens which is used in various program modes. The lenses themselves are
pretty much the same optical formula as as are the M and A 50mm f1.7
only the coatings have had any real changes since the f1.7 introduction
in the early 70's. You may however save yourself a bit of coin buying
the FA as the F is quite a bit rarer than the FA and is often more
expensive.
On 11/21/2011 1:57 PM, Michael Beacom wrote:
Hi-
What do I gain with a FA series lens, over an F series lens for a K5?
Any thoughts on a DA 40mm f/2.8 Limited vs. one of the 50mm f/1.7s?
Cheers
Mike
--
Don't lose heart! They might want to cut it out, and they'll want to avoid a
lengthily search.
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