<<But, is the $3,000 more than its 300mm sister worth it.>>
Paying the extra money will be worth it if you need the extra 100mm of
focal length. I can't think of anything more frustrating than buying a
$5000 lens and always using a TC with it because you bought the wrong one!
I guess if you don't want to carry the 400, you could get the 300 with the
TC14E and lose a stop of light and some (slight) loss of image quality. It
makes much more sense to buy the right one first. Of course, if you'd be
using a 300 most of the time and only need a 400 occassionally, get the
300. Buy based on your needs.
<<Also, I am aware that the E series teleconverters are compatible with the
long AFS lenses. Any comments on how well they work on the 300/400 AFS
lenses. AF Speed? Sharpness? Overall quality? Moreover, have their been
any rumors of a new AFS only series of teles from Nikon. I would hate to
buy an TC14E and then see a better, fast TC14AFS hit the market.>>
I think that, if you're looking into buying these expensive optics, you
should really learn how they work. The TC14E has no bearing on the AF
speed of the lens, unless you account for the light loss. But no one can
upgrade that. The TC14E just has electrical connection and a stop-down lever.
Dan
