> > Canon now includes the MTF charts for their lenses on their new > webpage. Check it out at > > http://www.usa.canon.com/eflenses/lineup/index.html > > I was looking at the chart for the 400 DO IS. Doesn't look very good or > am I missing something? Is this the compromise one has to take for a > shorter and lighter lens? Does anybody made any real world comparison > between the 400/2.8IS and the 400/4DOIS? > > Robert >
Hi Robert, >From what I can tell based on the way DO lenses are supposed to work, this is a limitation of the DO elements sitting in the light path. The newer DO lens performance over time may get better but I doubt they will get as good as more "normal" lenses. So the weight and length benefits of the DO lenses come at a cost and if I'm correct, a rather high one in terms of image quality. Anyway, I don't really see why people are all excited about the DO lenses. The EF 400 4DO IS is about the same size and weight (O.K. it's a little lighter), as the EF 300 2.8L and has the same f/4 and f/5.6 aperture that the EF 300 2.8L has with an EF 1.4x and EF 2x respectively BUT you don't get the flexibility of the incredible 300mm f/2.8 lens that comes free with the EF 300 2.8L. To make matters worse, you get the honor of paying a very lofty price, about what it would cost to buy a mint EF 300 2.8L AND mint EF 400 2.8L and EF 1.4X and EF 2x converters which are MUCH better lenses and offer a flexibility to a camera system that the EF 400 4DO IS can't even begin to approach. Regards, Chip Louie * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
