Zeiss altes DIC, adjustment of the condenser prisms

[Rene]

Hello all,

A friend of mine wants to transfer the DIC prisms to another condenser turret, but has no idea how to adjust them properly. And I am curious as well, as the irises in my DIC condenser do not move very smoothly, but till no I have been very reluctant to start working on it because of this issue.  Can someone give me tips on adjustment?

Many thanks, René

(Of course, replies in Deutsch are very welcome, and I apologize for my usage of English)