I`m posting this topic after several threads about DoF, the convenience/need of faster primes, etc., etc. Most of the times we think that fast primes are irreplaceable for low light and/or action photography, -something a bit demanding if we want perfectly focused shots-, or for subject isolation -with extremely blurred backgrounds-, that I personally find unnecessary (-sometimes- I mean), and many times, boring. As another "environmental portrait photographer" I consider myself (pretty mediocre, BTW), there is an article in the current issue of the Nikon Pro Magazine that I think is worth a look: Sam Barker. I find on his photos a magnificent use of DoF in this scope. He like to use a D3X, 24-70/2.8 and 70-200/2.8 lenses, plus two SB-900 units. No fast primes. Only on his wishlist, he mentions a 85/1.4G or (notice that he says "OR") a 24-120/4!