SonySEL50F14Z Planar T* FE 50mm f/1.4 ZA Lens

Q: Does this lens accommodate eye AF?

Yes it does. If you are shooting with a A7RII. This is the sweetest lens that I own. It is on my Sony A7RII all the time. People complain some about the weight but that is overshadowed by quality of the lens, the sharp clear photographs. It is just a great lens.

Q: Does this lens has OSS?

Hello, No I am almost positive this lease does not have OSS, There is nothing mentioned in the literature for the one I have, and Sony usually lists that in the description.

Q: It worth to upgrade from my Zeiss 55 to this?

Absolutely, in all ways possible except if you can hold its weight for whatever reasons. The only other con is price but I would highly recommend that you save for it and get this lens instead of the 55. It's totally, absolutely, completely worth it.

Q: Do i just switch to mf on the lens and the camera will sync automatically?i have a friend who owns an a7ii and switching mf button on lens wont work

I have the a7ii as well and if I switch AF/MF at the lense it changes the camera to correspond. Not to disagree wth your friend as there may be a setting in the camera that forces the camera to ignore the lense. It could also be a problem with his lense? If I switch on the lense to MF it also auto digital zooms on subject when you focus to allow more accurate focus. Hope that helps