Hi Mark I will have an eye on the Sigma APO 400mm on auctions, thanks a lot for your report. greetings Markus
>> market a few years ago. >>Personally, if I >>were looking for a birding lens to use with the *ist-D now, I'd >>look for a >>Sigma APO 400mm macro f5.6. (Sigma made several 400mm f5.6 >>lenses, but the >>'macro' was the best.) >>
