Best 85 I've ever used. Not sure how applicable it is to nature photography, but in the studio it's 100%. Compared to the Z85/1.8 which rarely left body #1, it predictably has smoother transition from IF to OOF regions as well luminosity fall-off (smooth contrast). Separation is naturally better. Picked up the lens at 2, had a shot delivered to a client at 4, so no neither time nor real motivation to do an extensive comparison. Lots more shooting next few days and I'll compile the results and add to this thread.