How many times do I have to post it? Optimizing
for digital and optimizing for format size
are two different things, and I dont believe
that the differences you are seeing in some
of the DA lenses vs FF lenses of the same
focal lengths are due to digital optimization,
they are due to Format optimization. (DA
lenses, designed to cover only 2/3 the angle
or 45% of the area of a FF sensor, can
be made to perform slightly better ONLY ON THAT
SMALL AREA, then a lens which has to cover
it all.

Digital optimization will become more of
an issue for SOME FF lenses when the FF sensor
is used, but for now, the limited angle
of coverage being used with FF lenses
on APS cameras is not bringing digital
optimization much into play IMHO. 

jco

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Thursday, February 08, 2007 1:20 PM
To: Pentax-Discuss Mail List
Subject: RE: NO FS this Friday?


Quoting "J. C. O'Connell" <[EMAIL PROTECTED]>:

> Screw you, I know more about what I was talking
> about and what I posted than you do.

Nice that you think so.
Dag, Godfrey and myself all seem to have experienced something that
disagrees with you regarding film optimized lenses though. Pentax and
the other lens manufacturers seem to think lenses need to be optimized
for digital as well. I suppose you are saying screw you to their optical
engineers too? You don't know anywhere near as much as you think you do
on this subject. Continue blowing hard though, you definitely know more
about doing that than I do.

William Robb


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