My tele lens just died. I'm looking at replacing it. I'll probably throw it on a crop body, but still would prefer more lens reach than 300mm. I've looked at the Canon 100-400 and recently at the Sigma 120-400. Besides price, which may be a factor does anyone have any comparison between these two lenses. If anyone has another lens suggestion, I'm all ears. Rick

Everything I read and see about the 100-400 IS, 120-400 OS and 150-500 OS indicates to me that if I'll ever want a telezoom (I opted for the 300/4 IS + 1.4X) I'll get the Canon for more accurate AF and sharper images on the long end. You may also want to look at the reviews section.

HTH.

Happy shooting,
Yakim.