I have a Canon 5DIII and 24-70 II. I take pictures of my 21-month old daughter exclusively at this point. (I used to do more street, fine art, etc. but don't have time anymore and won't for the foreseeable future.)
I want to add a couple of fast primes for lower light work and shallower depth-of-field. I'm trying to decide between a 35 & 85 and a 50 & 100. My decision will be based on focal length preference, of course, but also on the quality/price/value of lenses available at those focal lengths.
I'm somewhat leaning toward 35 & 85, for a few reasons. First, from what I can tell, the Sigma 35/1.4 is probably the most highly regarded of all of the 35 and 50 autofocus lenses. Second, I like environmental portraiture and tend to shoot quite a bit indoors, so the wider perspective of the 35 might be a better fit there. Third, it seems the portrait options are better at 85 than at 100? The 85L II is legendary, and many agree that the Sigma 85 comes close to it at less than half the price.
On the other hand, 50 is a great focal length for general work and casual portraits, and the 50L has beautiful, creamy bokeh and a nice look. (I actually own the 50L now, and enjoy it.) The Canon 100/2, while not as highly regarded as the Canon 85L or Sigma 85, is still a great lens by most accounts.
I guess this also depends somewhat on my future lens plans. Frankly, the only additional lens I can imagine getting in the future (assuming my subject matter doesn't change) is a telephoto. I would probably either choose the 70-200 IS or the 135L.
Curious to hear if you have any thoughts about this choice? Thanks.