I am looking to get something that is nice and wide with worth the money with good image quality. I will be using this as a portrait lens(because I can get close to my subjects) and as a general wider then my 50mm f1.8 mkII. Autofocus should be decent in noise and does not need to be fast. I would also like a prime, but can settle with a zoom. It just needs to be wider then my 28mm f2.8.