Probably not relevant, but Sinar Shutters (Norma Green or Modern Black), and Sinar "Rabbit Ear" Lens Boards, allow setting shutter speed and aperture from behind the camera. There are basically four levels to the system; Barrel Mount with No Automation , Barrel or Regular Shutter Mount, with Aperture Cable Only (Direct Operating), and finally the Deluxe, Rabbit Ears with spring-loaded aperture control (this last one stops down the lens to taking aperture when you close the shutter blades. Deluxe Deluxe is shutter cable, closes the shutter and stops down the lens, when you insert a plate in the camera back. These do work well for me, I have some of each. I appreciated the operating speed when I was shooting in fleeting light