I dont use that fl often as its a bit too tele to be used other then some closeup makeup shots of the bride and BG pictures outdoor but for $180, and by the review, although shot with a crop sensor, seems impressive. at f/4 seems quite nice. but damn manual focus on this wont be easy. the 1.4 will basically be "get it into the rough area and shoot 10 images with minor focus tweaking to get 1 good shot" cause ive had the 85 1.4 ais and nailing focus on that was really tough. nailing with this one is like finding a unicorn.
cant find enough reviews. specifically with full rez downloads. untouched. build seems like its worth $170 too by the image below