Finally have some spare time and got on loan the needed adaptor to put things together. Quick testing and the combination with RB 67 + IQ 180 + adaptor for Mamiya ZD backs with a small change seems to work.

I'll do some more testing next weeks. At least the following lenses waiting for RB: 65mm K/L, 90 mm C, 250 mm C and 360 mm C. For reference have a bunch of LS lenses for DF.

Has anyone done before studies on how these older RB lenses work?

A kind of historical feeling taking pics with my camera I bought 1975 while serving UN forces in Cyprus. No batteries needed for camera and sounds ok.