M48-Extension Tube Kit Male thread M48x0.75;Female thread M48x0.75 Eliminates a range of focusing problems. You can use this extender with any camera or eyepiece or with various adapters. The M48*0.75 threads on both ends make it extremely versatile. Length: 5mm 10mm 15mm 30mm 5mm 10mm 15mm 30mm 4 pieces extension tube kit; The required spacing can be achieved by combining several extenders of differing lengths as you like For Focus Problem Use this extender for obtaining the correct image scale or for the exact spacing required for a reducer or field flattener; Get to the right focal plane for focusing with a camera or eyepiece Inner Threaded Design Internal threaded design eliminates stray lights and reflection light for clearer and sharp image during solving spacing problems in astrophotography Stable Connection Both ends of each extension tube are respectively M48*0.75 male thread and M48*0.75 female thread. Through rotation, the threads can be tightly connect-ed together, which can provide excellent stability between the telescope and the camera.

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