Orion 1.25-Inch Variable Universal Camera Adapter Adjustable length adapter lets you attach a T-ring equipped DSLR or SLR camera directly to your telescope Useful for either prime-focus or eyepiece-projection astrophotography with refractors or reflector telescopes Slides into 1.25" telescope focuser or 2" focuser with step-down adapter; has T-threads for attachment of camera body Allows you to vary the magnification without changing the inserted eyepiece when performing eyepiece projection astrophotography Requires T-ring to fit your brand of camera (T-rings sold separately)