VITE 1.25" Variable Universal Camera Extension Tube Adapter for 1.25" Filter Lens Telescope 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 Lifetime warranty;we confidently promise lifetime warranty for each one from us