Versatile T2 Extension Tube 3mm 5mm 10mm 15mm 20mm 30mm M42x0.75 Double Sided Astrophoto Male and Female Thread Extension

Multiple T2-Extension Tubes in different lengths allow you to have the space you need, and you can freely use 1, 2, 3, 4, 5, 6 extension tubes The extension tube set is used to achieve the correct focal length and accurate spacing you need, which will solve the problem of astrophotography spacing M42x0.75 screws on both ends for versatile use. Thread M42x 0.75; Female Thread M42x0.75; Combining multiple extenders in different lengths gives you the right focal length to focus with your camera's eyepiece All metal and anodized for durability and long-term use, Manufacturer: YIGZYCN