The GSO Universal 1.25″ T-Adaptor Barlow is designed to allow you to attach your Digital SLR Camera to any telescope with a standard 1.25″ focuser and simply drops in like an eyepiece. This versatile Barlow will double the power of any 1.25″ eyepiece and triple with extension adapter for visual use. The adaptor requires the appropriate T-Ring for your make of camera to securely attach the camera to your telescope’s focuser. The telescope then becomes the camera lens allowing you to image the night sky. The built in Barlow lens in this T adaptor will increase the magnification by 2x ideal or Lunar and Planetary imaging.