> > Ken, > > > > While fast glass may be sexy, if that once in a lifetime photo needs an > > exposure of 1/250 at F8 who cares about F2.8? > > > > Peter K > > > A good point often overlooked, How often is the shot at f/2.8? > > Bob >
Peter, you had to be rational and logical! :-) Bob, there's some truth to this logic, and yes you are right with Peter that a lot of shots are not done at f2.8, but this depends on what your subjects are. I would like to get the f2.8 lens for two reasons: 1. Better AF acquisition in low light conditions, and this is where IS can come in handy if the lens is hand held 2. Faster and more accurate AF with the centre AF point BTW, I had an interesting experience recently with Canon service center when I left my 3 lenses and the 1D Mk 2 with Canon to check focus accuracy. I was shocked to get a phone call that the mirror box of the camera was damaged and had to be replaced at approx. $700, I refused to give the go ahead for repair and went to the service center immediately to see the "damaged mirror box" for myself, the explanation I received from the girl at the service counter was that the technician reported "it didn't sound right" when the shutter is actuated and assessed the mirror box was damaged. After trying out the camera myself, I immediately knew that the technician did not realize the "quiet mode" Personal Function that I had set which does not return the mirror until the shutter is released, the technician was pretty embarrassed when he realized that was why the mirror return "didn't sound right". He also pointed out that my 1D Mk 2 was "just a little bit out of focus" when he tested it with their own EF85 f1.8 reference lens, he indicated he will calibrate each one of my 3 lenses with the camera and any minor focus offset data required to achieve perfect focus for each lens will be stored on board the camera electronics, but he did say a fast lens will benefit more from this custom matching of the camera with the lens as slower lens with their broader depth of field at their maximum aperture does not show the minute focusing variation of the camera. I guess I will bring the 70-200 f2.8 for them to verify focusing with the camera body and make any adjustment if necessary. That is if I can convince myself to actually buy this lens! Ken * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
