Hi-- Hmmm..., 180AF is good on 14A (O.K. on 2X, but
prime 300 F4 or F4.5 is better (no converter). 70-210,
200 are good on 14A, not TC200. 500mm older mirror is
excellent on 14B. 400mm F5.6 is excellent on 14B,
TC300, usable with TC200. 75-150 is good on 14A, TC200.
Short teles are excellent on 14A, good on TC200.
300mm ED non-IF is superb on 14C, TC300, and decent
on two combined(!). Short tele zooms are good on 14A.
Most normal-short lenses are very good on 14A -
some are good on TC200. 100-300 is poor on converters.
Non of this says much about the quality of the lenses
wiyhout converters - most are excellent reguardless
of price - focal length. Ah, should write a book....
Hope this helps. David