Fringer announced a new Contax 645 to GFX adapter with full electronic aperture and autofocus support:
Will be available soon. Support Contax 645 lenses on GFX50s with electronic aperture control and auto focus (AF is for 35, 45, 80, 140 only).
A GF63/2.8 is needed for activating the adapter. Or the adapter will not work. Please make sure you own it or can borrow one.
There are limitations! Please download and read the user’s manual before placing an order.