Nikon 7806 Binocular Tripod Adapter (E Series, Superior E, Astronomy Series & Zoom XL) Weighs only 0.42 pounds Easily mount your Nikon E2, superior e, astronomy series, or zoom XL binocular to a tripod Use with any tripod head with a 1/4-inch-20 threaded screw Compatible with any binocular with a central shaft up to 14 millimetres in diameter Remarkably well-balanced