I am using this lens on the Sony A7r III via the Techart Pro adapter. This gives me pretty fast autofocus. It also allows me to use face detection and eye AF. Why did I buy one of the most expensive 35mm lenses just to fit a camera it wasn't designed for? Draw this lens. Image reproduction is excellent with incredible color accuracy and sharpness. While this lens is technically imperfect at Sony FEmount, the images are extremely artistic and cinematic. The lens is also relatively compact compared to Sony's 35mm 1.4 FE lens. price, in my opinion. This is a lens that will be passed on to your next generation.