Originally Posted by kitaoka
IS makes a lens way more useful, for sure, though I'm not looking to ditch my 400 f/5.6 because my 100-400 zoom has IS and the same aperture at 400mm. If you've got light, and something steady to brace yourself on, or can deal with a tripod, or just press it against a tree, or lay down on a rock, or whatever.... But yeah, IS would be a fantastic addition. If there was an IS version, i'd totally be looking to trade in...