Baader Planetarium VariLock 29 T2 Extension Tube 20-29mm

The Baader VariLock 29 T2 Extension Tube gives you complete adjustability to enable you to exactly set or vary the spacing between T-2 components. Perfect for exact positioning of reducers, coma correctors and other optical or imaging system components.It features an accurately engraved graduated scale for an easy visual determination of the tube length (0.5 mm graduations). Simply rotate the inner tube until the desired length is reached and then tighten the lock ring with the included spanner wrench.