Features: Webcam adapter for telescope 1.25in, that means it with standard 1.2in telescope eyepiece port. This adapter has built-in filter thread on it, and the interface to camera is M12*0.5(male thread). Webcam transfer interface is 1.25 inches, full metal aluminum alloy made and has a long life of service. It will not appear during use, such as deformation, breakage, rust, surface oxidation, or paint removal. How could astronomy lovers and photography lovers miss such a good accessory. Specification: Condition: Brand New Material: Aluminum Alloy Color: Black Connector Size: M12 x 0.5 Camera Interface Diameter: 1.25 in Length: Approx. 4.2 cm / 1.7 in Weight: Approx. 20 g Package List: 1 * Adapter Ring (Camera and telescope are not included) Package List 1Webcam adapter for telescope 1.25in, that means it with standard 1.2in telescope eyepiece port. 2This adapter has built-in filter thread on it, and the interface to camera is M12*0.5(male thread). 3Webcam transfer interface is 1.25 inches, full metal aluminum alloy made and has a long life of service. 4It will not appear during use, such as deformation, breakage, rust, surface oxidation, or paint removal. 5How could astronomy lovers and photography lovers miss such a good accessory.