----- Original Message ----- From: "Chip Louie" <[EMAIL PROTECTED]> > The idea of going with a 300mm f/2.8 lens is IMO > going to be a better choice because you get a fast 300mm lens, a still fast > 420mm f/4 lens and a reasonably fast 600mm f/5.6 lens AND still retain full > AF operation if at a somewhat reduced speed.............................. > > I routinely use an EF 300 2.8L and EF 1.4x > and have not concerns with image quality or AF speed for sports. I very > often will go to the EF 300 2.8L with the EF 2x converter and used with care > the AF is O.K. but noticeably slower than when used with the EF 1.4x or > bare. As to image quality there is again a noticeable loss in quality but > as a 600mm f/5.6 AF lens the optical performance is still very good if not > excellent..............................................
Hi Chip & Ken, I agree with Chip and have compared notes previously as we have similar applications. I would add that my recent acquision of the seriesII Canon 2x has been giving me noticably better results at 600mm even when comparing smaller prints. The setup I am using with the 1v is also giving me good and consistent AF results with fast moving subjects. The upshot is that I am shooting more trackside work at 600/5.6 than I was previously. I would recommend getting the seriesII 2x if considering this combo. The seriesI 1.4x is fine. Regards, Tim * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
