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The Celestron T-Ring for Sony E-Mount Cameras allows you to use an E-mount camera to capture photos with your Celestron telescope. The T-ring attaches to the lens mount of your camera, securing via a sturdy bayonet flange that locks in place just like a lens. Then you can attach the other side of the T-ring to your telescope. A Celestron adapter (sold separately), such as the Celestron T-adapter, will be required to do this. It's the optional adapter that will secure to your telescope, and the T-ring will then thread onto the adapter. The Celestron adapter you choose depends on the type of photography you wish to do.
The T-ring is made of black-anodized aluminum. The internal surfaces are blackened and glare-threaded to provide the highest contrast. The T-ring has a ribbed surface that allows you to securely grip it when threading or unthreading the ring. The T-ring should be used with compact DSLR/mirrorless type cameras only. Larger cameras would be too big to attach to your telescope.