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T-2 Extension Tubes enable you to securely set or vary the spacing between T-2 components. The tubes are available in three lengths, 7.5mm, 15mm, and 40mm, and are provided with an internal T-2 thread at one end and an external T-2 thread at the opposite end. Full internal threading and blackening kills any stray light reflections.
T-2 Extension Tubes are used throughout the ASTRO T-2 System™ to provide proper spacing of system components. You can use the extension tubes anywhere you need to precisely space and couple any of the T-2 components, in configurations of your own design.