Features： An adapter ring for connecting camera and telescope, helping to shoot more clear and beautiful photo of the distance scenery. Replacement for Nikon D90, D80, D70, D60, D50, D40x, D40, D800, D700, D600, D300s, D300, D200, D100, D7000, D5200, D5100, D5000, D3200, D3100, D3000, D4, D3x, D3s and other DSLR cameras. Compatible with telescopes with standard 1.25 inch eyepiece, perfect for astrophotography. Made from premium aluminum alloy with exquisite anodic oxidation and CNC technique, oxidation-proof and rust-resistant. With a red dot mark on the ring, easy to install, just point it with the white dot on the camera and then tighten it, the installation work is done.