another extraordinary release
Bought it yesterday. Made by Bolex.
It is a bulb-setting timer. Once you activate it, it releases the camera shutter but disengages again after a preset time. Useful for the bulb-setting, but actually made for cine cameras.
It also has something remarkable about the release stroke.
As the one above the tapered thread can be fine adjusted in position to the release bolt. In this case though added by a counter-nut, thus practically working.
But it also has a two-step setting. Not by setting a switch as in the timer above, but by adding a second tapered thread. It is a hybrid adapter (male/female) that is screwn on the primary thread. By this the bolt's effective stroke is shortened by 4mm.