M42 VARIABLE EXTENSION 20.5 - 30mm

Extension tubes are intended for reaching the optimal distances between field flattener/reducers and sensors. They are also needed for eyepiece projection. This variable M42 (T2) extension allows to fine tune the distance by fraction of millimetres.
The threads (male and female) are the international used M42 threads (T2).

The extension consists of three parts (from left to right):

• Base with long male M42 thread

• Short locking ring with knurled outer part and internal M42 female thread
  

• Connection part with M42 female thread and M42 male thread