The SmallRig EVF Mount is a universal option designed to support any electronic viewfinder with all 1/4” thread screw holes. Coming from the top of your 
DSLR camera set up, it leaves plenty of room at the lens for focusing, even with widest of lenses.
The EVF Mount 360°-pivoting points allow for maximum adjustment. This enables you to set the required tension for each section and make the adjustments on-the-fly without having to adjust the levers repeatedly.
The SmallRig EVF Mount NATO enables you to attach a viewfinder on a NATO Rail. The Bracket is compatible with most viewfinder and monitors. It allows for cradling, under-slinging, or standing of your EVF on the rail.