BAADER M54 EXTENSION TUBE SHARPSTAR13 8mm) while maintaining an optical

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BAADER M54 EXTENSION TUBE SHARPSTAR13 8mm) while maintaining an opticalThe Baader M54 extension tubes have male M54 x 0. 75 threads on one side and female M54 x 0. 75 threads on the other. They can be useful for reaching the precise backfocus distance as required by correctors. It features a knurled ring for easy gripping and internal baffling to reduce internal reflections. Specifications Optical length 5 to 40 mm Clear aperture 51 mm Outer diameter 59 mm Connection telescope side M54 x 0. 75 male Connection camera side

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