Features: Mount the T ring on your camera via thebayonet flangeand secureitin place likelens The M42x0.75 T2threaded side of the T Ring connects to a 1.25" telescope adapter (included) that suits most telescope eyepieces. It provides a secureand stable connection between your camera and telescope, enabling you to capture stunningastronomical images This T ring can connectyour camera to a telescope for professional astronomy photography. Note: The T ring has no electrical contacts so manual focusand manual apertureadjustment are required Black anodized aluminum alloy withmatte interiors prevent reflectionsandlens flarefrom spoiling yourshots For 35mmEOS cameras, including forEOS-1V 1N 5D Mark IV6D MarkII80D 70D 800D 750D 300 RebelGII, etc. Specifications: Interface: 1.25inches (approximately 31.7mm) T-head internal thread: M28x0.6mm T-head external thread: M42x0.75mm Bayonetinternal thread: M42x0.75mm ForEOS-1V 1N 5D Mark IV6D MarkII80D 70D 800D 750D 300 RebelGII, etc Material: Aluminum Alloy Appearance color: Black Package Includes: 1PC 5P0012B Adapter 1PC T2Bayonet note: Due to the problems of lighting effectsand shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-1cm error due to the manual measurment.