Item Type: Telescope Camera Adapter Material: Aluminum alloy Sleeve Thread: External, M42 x 0.75mm (commonly known as: T2 thread) Connection Thread: Internal, 2in 24 tooth inch thread (commonly known as: SCT thread) Compatible Models: For micro single EF M bayonet cameras 1、Thread Size: M42x0.75mm thread is suitable for SCT interface astronomical telescopes,T2 adapter ring suitable for micro single EF‑M bayonet cameras. 2、Applicable Telescope Models: Telescope camera T mount is suitable for Celestron 5SE, 6SE, 8SE, C5, C8, C9.25, C11, C14 and other SCT interface main telescope. 3、Multi Uses: Telescope camera T adapter set is used to connect camera to telescope, allows you to observe and take pictures of the entire moon, gas nebulae, or galaxies. 4、High Strength Material: Telescope camera adapter is made of aluminum alloy material, durable, will not fade, do not hurt telescope thread. 5、Easy to Install: Fine workmanship to ensure precise fit and firm connectionbetween camera and telescope, directly installed adapter ring, no adjustment.