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Our growing selection of threaded couplers enable you to convert T-2 threaded parts to alternate thread sizes or genders. 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.
The Inverter is a simple T-2 externally threaded ring, which can be used to convert internal T-2 threads to external T-2 threads (gender changer). It is also useful for retaining certain components, like the Alan Gee Mark II Telecompressor when used with the Celestron/Baader 60° Bino-Viewer in 2" configuration.