Nick Chronis , Aug 24, 1999; 11:40 a.m.
This has probably been answered somehere here already but here it goes. Nikon unfortunately doesn't currently make a 400 5.6 AF lens. The 300 f4 with a TC is too slow for birds in flight. The 80-200 with a TC20e will still be slow and there will be a substantial degredation in image quality. The Tokina 400 5.6 ATX will hunt for focus and you may have difficulty locking focus (unless you're Moose Peterson). What some Nikon shooters do for bird in flight photography is dedicate a Canon EF 400 5.6L on a Canon Elan or such body and use it. This lens I can tell you is great for in flight shooting from personal use. I think the difference lies in the distance switch on the lens. You can set it to 12m to infinity which probably makes it easier to lock focus.