In message ,
"David J. Littleboy" wrote:

wrote in message
.. .

... for a given focal length, or range (as in a zoom). A $70 50mm lens
can be optically superior to an L-grade wide-angle zoom.

There are always exceptions.

http://etischer.com/300d/Tamron28-75.html

Well, I was thinking about stuff like 16-35mm, etc.

It looks to me that the Tamron at f/4.0 at the ends and f/5.6 in the middle
is about as good as lenses get. (Although it's a pity his 70-200/4.0
misfocused.) It's not coincidental that my Tamron has produced the sharpest
images I've seen from the 300D.)

Nice. I might find that hard to believe, except for the fact that I
already own one Tamron lens, the 90mm f2.8 Di Macro, and it is the
sharpest lens I own.
--


John P Sheehy