Jordan and Max compare the Panasonic 12-35mm f2.8 Mark 1 and Mark 2 in the video above and come to an interesting conclusion. It’s probably only worth owning a Mark 2 if your body currently supports dual IS version 2, otherwise, it isn’t really worth upgrading at this time.
Panasonic 12-35mm F/2.8 II ASPH: B&H Photo / Adorama / Amazon