The Sigma is a steal at the current price compared to the competition, really hope this Art line gets a 135mm. I was looking for a new lens, but instead bought a Sigma DP2 Merrill as a sunny day camera when I can't be bothered with the weight of the D800. Very impressed with the IQ so far, black and white especially. Although it wouldn't be Sigma if they didn't throw in some absolutely bizarre handicaps.