Ok so for Christmas my wife (santa) bought me a 17-50mm lens by sigma. Maybe she saw me looking at it one night and took note, but here it is. My question is I usually shoot with a 70-200 mm or 85 mm for portraits. Ive been a single subject shooter and by no means a pro photographer, more or less trying to better myself each day. But generally what uses does the 17-50 mm lens target? groups? close ups? Portraits? I dont have any lenses that shoot that low.