I always use the EOS1dMkIIN + EF300mm.f2,8 L USM IS for flying bird shooting. With big birds as cranes, vultures, etc. I usually get a 30% of keepers. But with flying pigeons and after more that 6000 pictures, my keepers percentage is not more than 2 or 3% and even less.
The problem, on my side, shooting flying pigeons without using a tripod at distances going from 10 to 50 meters seems to be that when the bird is too close, i.e., less than 20 meters, my pictures get blurred. I think this is due to my difficulties to keep the bird at the center focusing point, because, in addition to their their erratic fly, they do it at a great speed, perhaps 20-30mph. This is obviously my fault, but I find that the camera+lens combination I am using, that I believe is the fastest available as regards AF speed, is not as fast focusing as I need.
Normally, during daylight here in Madrid (Spain) I shoot at a fixed speed of 1/1000, which gives an opening of about f6,0 to f2,8 at an average ISO of 200. Custom functions that I believe related to the AF speed are the C.Fn-13 which I keep at the default setting 0 (45 AF points) and C.Fn-17 which I also keep at the default setting 0 (uses a single point AF). The selected focusing point is always the center point. Whereas normally I shoot the pigeons with a blue sky, I put +1 full point of exposure compensation and use the center-weighted average metering. In the 300mm.f2,8 lens, off course AF is activated, IS is also activated in position 2 and the shootong distande is set between 6,4 metres and infinity.
And now comes the question (please excuse my bad english!): Does any one can tell me what are the settings giving the fastest AF? Am I using the best settings for this purpose?. Thanks and regards.




