I had the 50mm 1.4 and was not impressed with my copy (purchased new) and I sold it. I doubt I'd ever sell my 135 f2 it never ceases to amaze me. the prion price it's a real bargain! My advice buy the 135 f2 or rent it and you will see for yourself grow good it is. The background blur is creamy and the picture sharp and colors and contrast beautiful! If it only has I.S. ! The only negative is the focal length is a bit long Especially on a crop camera.