>>2576258It's a very specialized, very good lens. It's made for one thing, and that thing is dreamy 3/4 or full body portraits. The AF is slow, it's not very weather sealed, it's not super durable, the lens is huge and heavy, etc. As
>>2576261 said, if you're asking about it, you don't need it. Get an 85mm f/1.4 for 1/3 the price and notice no difference in your usage, more or less.