For a T3i, I already have 35mm f2.0, 50mm f1.4, and 70-200L, is there a need to get a 85mm f1.8?
I also have a T3i, Sigma 30mm f/1.4, Canon 50mm f/1.8, and Tamron 70-300, and I have been debating getting the 85mm f1.8 for some time. The only thing I've been struggling with is I don't take many outdoor portrait shots (yet). This lens would be great for that, but not so much inside, unless you have enormous rooms. You'd have to stand so far back to get a persons head in frame w/ 85 in doors (remember it's equivalent to 136mm on our crop sensors). In fact, I bought the 30mm because the 50mm was often times too tight indoors for me. Good luck! It's a great price either way!