I have a very old EF300 F/4.0 LUSM without the stabilizer. I consider it a favorite becuase of its light weight and sharpness. It is a very, very useful for daylight sports.


I have only used the 100-400 once andit justwasn't fast enough or easy enough to use. I'm sure if i owned one, I'd learn to use the funky push-pull zoom, but it was akward for me.


I do see two or three100-400's on the sidelines at high school games, so it can certainly be used for sports, even at night.