To be setup. Could probably mention the components of the Yashica Dental system, remote control cords, flashes, teleconverters, extension rings, etcetera.
Any information is welcome.
Still have to see how my normal primes perform with them. They look well-built and that's all there is to say about extension rings. FR Winder Winder that fits all FR bodies. If 2fps is too slow for you, go shop for the Contax RTS motordrive. I still should train myself to switch to the right eye, though.