SVBONY SV157 1.25″ Extension Tube – 56 mm & 70 mm Size:70mm and that’s the top reason

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SVBONY SV157 1.25″ Extension Tube – 56 mm & 70 mm Size:70mm and that’s the top reasonSVBONY SV157 1. 25 Extension Tube is designed to increase the optical path length in telescope setups where additional back focus is required. Available in 56 mm and 70 mm lengths, it provides a simple and reliable solution for achieving accurate focus in visual observing and basic imaging configurations. Key Features Extended focusing range Adds fixed optical length to help achieve focus when the focuser travel alone is insufficient. Precision