The TWIN Schieppati Switch Will your camera work with the Twin?

The Twin switch can be used ONLY if the common pole of the two switches in your camera is connected or pulled down with a resistor to GND

Please check with a simple test:

Identify the three points of the switch as follows: A: First step (focus) B: Second step (shutter) C: Common pole

• Check if the camera works like it should (the test will not work with empty batteries or ...),
• Connect 2 diodes as shown in the drawing above,
• If your camera still works with two diodes connected with the cathode to point C, your camera has a common GND pole (C) and the Twin Switch can be used.