Manually focusing with third party lenses on a Sony A7RII is not easy. Luckily the Sony A7RII provides a couple of great tools to help you get that sharp focus when manually focusing with third party lenses.
One of the most useful features in my Sony A7RII is the ability to use focus peaking and manual focus assist. I don’t use manual focus a lot simply because the auto focus is that good. However, when I do use manual focus these two features help me get razor sharp focus in my images.