I got a new-to-me lens yesterday (50 mm, 1.4 for anyone who cares) and took it to the dog park today to put it through it's paces.
It takes fabulous portrait pics but not so hot action pics. But that is OK. I wasn't expecting it to do great for action.
I really bought it for use at the daycare. It is dark inside (at least in regards to taking pictures) and it will be better to use inside as it focuses a lot faster than the lens we currently try and use.
But I just may need to borrow it for some photo sessions! It has fabulous bokeh!