GAS, as in Gear Acquisition Syndrome, for camera stuff. Finally the Sigma 50mm F/1.4 ART lens is now available for pre-order. I sold off my older Sigma 50mm lens last year in anticipation for this ART line version. I've missed not having a 50mm lens in my camera bag, more than I thought I would. I sold off the older version due to inconsistent AF for near and far field objects. Maybe the Canon 135mm F/2.0 lens. And a couple of Paul C. Buff Einsteins, Vagabond Mini, and some modifiers.