« on: December 30, 2011, 07:31:47 PM »
I bought the 28mm 1.8 several months ago. It's a fine less, the bokeh is excellent, great low light capabilities, sharp after f4. No issues at all. I was not happy with the color out of that lens mainly because I use L lenses so the colors were a bit off when compared to my other lenses. I upgraded to the 35mm L 1.4. If your budget allows get the 35mm, much faster focus, bokeh is better than the 28mm (others may have different results).
The 400mm is sharper than the 100-400; primes generally are. I have the 100-400 and it's a fine less; you can get very sharp pictures with it, but there is a learning curve with it. I don't use it often, but when I do the first several images are less than ideal in my opinion.