Televue T-Ring Adapter - PTR-1250 replaces the eyepiece holder on the 1.25 inches 2.5x and 5x Televue Powermate Barlows. Threads directly onto the chrome barrel in place of the eyepiece holder. TeleVue T-Ring Adapter - PTR-1250 is suited for photography with short focal length refractors capable of using 1.25 inches visual accessories. Allows for the attachment of a CCD camera.