Gosky 1.25" Extention Tube Camera Adapter - Connect Telescope to Camera 1.25 Inch camera adapter lets you attach a T-ring equipped DSLR or SLR camera directly to your telescope.Useful for either prime-focus or eyepiece-projection photography with refractors or reflector telescopes. Slides into 1.25" telescope focuser with step-down adapter; has T-threads for attachment of camera body. Suitable for eyepiece projection with an eyepiece smaller than 37mm in diameter ,Made of high grade alloy, not plastics. Requires T-ring to fit your brand of camera. Features: Size： 1.25" Thread: M42mmx0.75 Package Include: 1X1.25" Extension Tube Camera Adapter P.S: 15days no reason reture warranty. You can return it back without any reason in 15 days. We take full ownership and responsibility for the quality of our products and will do best to solve your problem quickly and efficiently. Any suggestion will be warmly welcomed.