Adapter: T2 inside – through (2958110 #34). / reversal ring
The adapter has a continuous T2 internal thread. So he turns it off
a T2 male thread connection a female thread connection.
Combining these two adapters gives you a 1.25″
Filter connection with T2 connection on both sides, which is only approx. 5mm
needs optical path.
optically effective overall length: 0mm
Height of the adapter: approx. 10mm