Rotation clamp – Baader Variable T2 extension – 12-16mm length.
Screw the two rings into each other the farther you go the rings
screws into each other, the shorter the extension. With that can
determine the distance to a fraction of a millimeter. When
Once you have the length you want, simply counter the rings with the
short lock ring and the adapter stays in the exact position. the
shortest distance is 12mm – you still have a few there
Threads for further adaptation. The longest distance is 16mm.
Thread on the telescope side – T2 internal thread
Thread on the camera side – T2 external thread
a very short T2 counter ring