JMI Combination 1.25-inch Eyepiece and T-Thread AdapterJMI Combination 1. 25 inch Eyepiece and T Thread Adapter, ADPT2 1. 25T JMI Adapter for mounting a CCD or other camera, with a standard T thread, into a 2" drawtube. It also doubles as a 1. 25" adapter. A T adapter holds a CCD camera more securely than a standard 1. 25" adapter. The adapter uses a compression ring to secure inserted equipment. It includes standard 48mm filter threads on the other end of the adapter (inserted into focuser end).