The Manfrotto 200USS adapter plate has been specifically designed to eliminate unwanted rotation of the spotting scope during viewing. Its universal design means it can be used to mount all makes of spotting scope, no matter what their foot shape (square, rectangular, trapezium), on any Bogen-Manfrotto two-way head (e.g. 3130 or 700RC2).
The adapter is made from machine-tooled aluminum with a black anodized finish. In addition to the standard 1/4-20" screw, it has two grub set screws to lock the spotting scope securely in position.