>for starting a new thread, search and I don't get along well >here, and I couldn't find this thread at the time to attach >the samples to.
Sigh, I just realized why I couldn't find this thread. I meant to post it in sports, it's in lenses. Well, sort of applies to both, as it was a pro's 400/2.8 that got me thinking about this. Apologies for spiting the thread.