Kinefinity Eagle e-Viewfinder Extension Adapter (1/4 inch-20)

Take the rosette off an Eagle e-Viewfinder and you are left with a flat face and no way to mount it. This adapter is what goes there: a compact vertical extension with a flat surface that seats against the finder and a 1/4 inch-20 threaded hole on the opposite side.

That turns the finder into something any third-party bracket can carry, including cold-shoe to 1/4 inch-20 adapters and generic arms. It also lifts the finder vertically, which is often the half-inch that decides whether an operator's eye lands on the eyepiece or above it on a given build.