Brief Description:
When you cannot get to the right focal plane for focusing with a camera or eyepiece. This extension tube kit solves this problem. You can use this extender with any camera or eyepiece or with various adapters. The M42 x 0.75 threads on both ends make it extremely versatile.
Use this extender for obtaining the correct image scale or for the exact spacing required for a reducer or field flattener. You can reach the extension length required by combining several extenders of different lengths.

Features:
1, Fully metal construction and anodizing aluminium process, durable for long time use.
2, M42x0.75 on both sides, eliminates a range of focusing problems
3, The required spacing can be achieved by combining several extenders of differing lengths
4, This extension tube for getting the correct image scale or the exact spacing required for reducers or field flatteners
5, The extension tube has a M42 interior thread and a M42 exterior thread for solving spacing problems in astrophotography and eliminates a range of focusing problems.
6, Type: Astronomical M42 x 0.75 thread Extension Tube
7, Male thread: M42 x 0.75mm
8, Female thread: M42 x 0.75mm
9, Color: Black
10, Net Weight: 364.5g / 12.85oz
11, Length: 5mm 10mm 15mm 30mm
SIZE: M42 2inch
Material: aluminum
Package include:
20 x M42 x 0.75 Thread Extension Tube(5mm,10mmm,15mmm,30mm)