In article <30E81850.43DE@efn.org>, pland@efn.org says...
>How about the Tamron 200-400 f4.5-5.6? I have only seen advertising
>on this lens but the alleged images look pretty good and it is AF..
>Anybody have any experience with this glass?

A thread consensus a ways back, as I recall (though my memory has
been [What was I writing about...? Oh.] known to fail me), was that
this was not one of Tamron's better endeavors, especially at the long end and in view of the speed and price.
Hope This Helps