Originally posted by link81 I love my F 70-210. It's not much longer then 200, but it has a character all it's own.
I've got one, too. It's a fast focuser, as well. For longer, I'm trying out a set of MF lenses: 60-300mm, 100-300mm (x2), and soon, 80-400mm (AF on Nikon; MF, old school, on Pentax). A Tamron SP 1.4x tele converter supplements (for Nikon, since these are much more plentiful and much cheaper in Nikon mount -- both 100-300mm's are Nikon mount, too; they can be "direct-adapted" to Pentax). I feel judicious use of one or more of these latter may prove to offer better results at the long end than the usual something-to-300 consumer zooms for my applications (mostly landscape). Just a guess, based on some on-paper/online research. This is a very economical approach if the MF lens is bought well. That may only require a bit of time to accomplish.