Rated 4 out of
Great but heavy"Had the 400 L f5.6. It had terrible CA so I returned it. Tried out the 100-400. Don't let the internet fool you - it's just as sharp at the long end as the 400 L prime (at least the one I tried was). Pretty much no CA - could see it only when I zoomed in 300% on the computer. The push-pull zoom is funky but easy to use. My advice is even if you shoot at the long end all the time, pick this one over the 400 L prime as the IS is worth it."