Luap wrote:
If you can get the appropriate sync signal out of the camera to the CST it should work, Because of the delay in a flash bulb the sync has to precede the shutter. Don't remember what this sync mode is this was called.
The sync will be correct since I am using a 1950s era camera. It's a mechanical switch. As you depress the shutter button, it causes the connection between shutter button and flash to close a fraction of a second before the shutter trips. That completes a circuit between the camera and the flash. The battery (either two AA or two C cells) is in the flash attachment. That's what fires the flash bulb. The flash attachment fits into two metal holes in the side of the camera. I was thinking I could get two machine screws, wrap the bare wires from a PC cable around them, and insert that into the camera's holes. I could then attach a hotshoe to the PC cable, and slide a CST into that. When the shutter is depressed it will complete a circuit that should fire the CST, in sync. On the other end I could attach the mini-plug end of the PC cord to the flash. I could attach the bare wires to the flash attachment's prongs (which ordinarily slide into the camera.) I could then plug the CSRB into the mini-plug. It would be a complete circuit, I think. The batteries in the flash are what actually fire the bulb, and they are either 2 AA or 2 C cells, i.e. 3 volts? If the CSRB is simply a switch to complete a circuit, this should work, no? I'm wondering if the duration of the signal from CyberSyncs will be long enough to trigger the bulb at this point. If the circuits all seem to be there, I will then go to the trouble of making the sync cord and trying it. If it works, I'll buy four more flash attachments, modify them, and then head down to the railroad tracks some night!
Kent in SD