I shoot my son's football and baseball games and have really enjoyed the quality I get with the f4 (without IS). His games are duing daylight hours.
However....I would like a little more length so I am considering upgrading to the 2.8 (without IS) and using the 1.4TC. Also thinking I would have a fast enough lens to help when he starts playing under the lights.
1. If I am happy with the quality I am getting from the f4, will I also be happy with the 2.8 and 1.4TC?
2. Is it reasonable to think I can get $400 for my f4? It is very good condition. I would say like new. I think I would keep it for anything less.