Focal Length Extension Tube Kit M48X0.75 Astronomical with Variable Combination, Eliminates Unnecessary Light for Photography

Remove unnecessary light from the middle: the design of the female thread can eliminate leak light and reflected light, making the image clearer and perfect. Aluminum alloy material: all-metal construction and anodized aluminum process, durable, use this extension tube you can achieve the exact image scale or exact range that a reducer or surface smoother is needed. Type: astronomical telescope M48 thread extension tube with extension tube is 3mm, 5mm, 7mm, 10mm, 12mm, 15mm, 20mm and 30mm. Variable Combination The required distance can be achieved by plugging together several extension rings of different lengths, according to your needs, you can use 1, 2, 3 or 8 extension rings. Center Fix Focus Problem The extension tube features an M48 female tooth and M48 male thread, which is used to solve the space problem in astrophotography and eliminate a number of focus problems.