Skip M wrote:

Canon even talks about
them being suitable for digital use...


Suitable isn't the same thing as "optimal". Remember, Canon is in the
business of selling people things, They sell you a 17-40, then 4 years
later they come out with a "digitally optimized" version and get to sell
another batch of the same focal length lenses. Watch and see if this
doesn't happen.

--

Stacey