RedSun
Member
The shutter button on the right of the GS-1 body and grip are electronic. However there is a separate mechanical shutter release (mirror pre-trigger) on the left side of the body, which allows 1/500 and T with the camera power off, or battery removed, and is the recommended release for long time exposures to limit battery consumption.
As I said clearly, I would not consider this as a mechanical trigger. Mechanical shutter release is only used in emergency situation and the strict sequence has to be followed. Or you will ruin your film.
Bronica says this very clearly in its manual:
There will be no shutter release action when there is no battery power. However, it will be possible to release the shutter at a mechanically-controlled 1/500 sec by reversing the mirror lock-up lever, after locking up the mirror first.
The shutter is only triggered electronically.