Sony A7R Shutter Vibration: Does Adding Mass (weight) Help?
Get the Sony FE 55mm f/1.8 Sonnar for A7R / A7 at B&H Photo.
See also the studio assessment of shutter vibration at 55mm and Sony A7R Shutter Vibration: Can it Be Mitigated by Sony via Firmware Behavioral Change? pages.
Added to my discussion of the Sony A7R shutter vibration is an interesting “mass stabilization” approach being worked out by Joseph Holmes.