Sony FE 85mm f/1.4 G-Master

Pricing & availability at B&H, Amazon

Gawd. I've never had a stronger emotional reaction to a lens. Breathtakingly sharp, eye-lash shallow depth of field.  Only thing is, it's best used on the a7s II or a7r II (as this is being written) because they have in-body image stabilization, and this lens has no stabilization at all. The Batis 85mm f/1.8 is actually the better call for the a6300 or a6000.