Great news for anyone using Contax G glass on their Sony a7RII cameras. Techart has released firmware update v2.0.1 that adds Sony a7RII PDAF support for their Techart GA-3 Contax G to Sony E-mount AF Smart Adapter (available at eBay | Amazon).
Techart’s Firmware Upgrade App:
Techart’s Firmware Upgrade App for Android and iOS allows you to upgrade your Techart GA-3 adapter via bluetooth connection with your iPhone or Android.
Find Contax G Lenses:
Read More About Techart GA-3 and Contax G Lenses:
Read Chad Wadsworth’s Post: Phase Detect Autofocus with Carl Zeiss Contax G lenses on the Sony a7R II