Our growing selection of Telescope Adapters enables you to convert your telescope to T-2 threading. They allow you to rigidly couple to various manufacturer's telescope focuser threads or to combine T-2 parts into useful configurations. Precision threading guarantees proper fit-up, and internal surfaces are fully sharp V-threaded and blackened to cancel any stray light reflections.
This adapter converts the external M42x1 threads of many Russian telescopes, into an external M42x.75 T-2 thread. The M42 x 1 thread is also common to Pentax threaded camera lenses.