cjc2 wrote:
Personally, I really do like the Sigma ART, as well as Sport, series of lenses. I own a 50/1/4, 135/1.8 and 24-105/4 ART lens and find them to be a bit heavy yet wonderful lenses. I am not a big fan of Sigma's older series of lenses, nor their contemporary series. IMHO. Best of luck.