Originally Posted by bburns223
I second what Brendan said on this -- I get away with it with a 24-70 f/2.8 on a 1D Mark III body (1.3 crop), but it's not quite as wide as I'd like for wide portraits and not quite as long as I'd like for tight portraits. The 135 f/2 prime gives me plenty of background blur on my 40D (1.6 crop) but it's a little long on that body, and frankly, a little difficult to hand-hold without IS. I seem to have better luck hand-holding it on the 1DIII.