I am mostly a landscape shooter so I don't take this out nearly enough. I was watching a friends dog last week so thought it was a good chance to mess with the 58G.
Just jumping in for a second to say how disappointed I am in the Sigma 135 Art compared to the 58. I'm not so much bashing the 135 as I am saluting the 58. I really thought the 135 at 1.8 would have that special background blur that we see from the 58 and 200. But it doesn't. The 58 and Canon 50L remain very special lenses.