I think the F should be better since it has 1 ED element. Perhaps wait till the Photokina and see if Pentax would release an FA*70-210/4ED[IF]? :)
regards, Alan Chan > I'm looking for a high-quality consumer long zoom. I have considered > the following: > > SMC-A 70-210 f/4 Zoom > SMC-F 70-210 f/4-5.6 > > Autofocus would be nice, but optical performance is more important. > > What do you think? Any others I should consider?
