A T2-Ring, also known as a T-mount adapter, is an accessory that allows you to attach your camera body to a telescope or a lens with a T2 mount. Adaptability is its primary function, meaning the T2-Ring you have must match the mount specifications of your specific camera brand and model. Whether it’s Canon, Nikon, Sony, or another brand, there are different T2-Rings designed to fit the camera’s lens mount. Therefore, the specific camera model that the T2-Ring is intended for will determine its compatibility. To determine which camera it is for, you may need to look at any identifiers on the T2-Ring, including branding or model numbers, and consult with the manufacturer’s specifications to ensure it fits your camera correctly.