bcurrie said:Pete, I do not have it (unfortunately), but from just the reviews and photos I have seen with it would highly recommend it. Economically, for bird photography, I think the Canon 75-300mmIS (definitely use lenses only with IS) is the best. The optics were supposedly recently improved after Canon had receive complaints. I have seen a number of photos with this lens (on another forum I belong to, a non-birding forum), and they were nothing short of superb.
jvhigbee said:Have 10D about a week. Using 100/400L IS telephoto. also 1.4 extender. works great.
paulh said:Just got ours yesterday evening and been trying them out today.
So far we've mostly been using a Canon 75-300mm IS zoom and a Canon 400L, but we've also tested the 10Ds out on our Canon 28-105mm zoom, Sigma 28-200mm and a Sigma 75-300mm zoom which all seem to work OK, although the Sigma 28-200 wouldn't work with an EOS 1V.
We've also got a Sigma 175-500mm zoom which won't work at all with the 10D.
eric s said:I've had the 10D, the 100-400L & Canon 1.4TC for a few months now. If you tape the pins correctly, the AF will still work with the TC. It won't work very well, but it does work.
Eric