I have a Schneider Symmar 300mm f5.6 sitting in a Compur Electronic-3 , but the battery compartment is missing. Since the battery is outdated anyway I'm planning to put together my own compartment with a total output of 4.5 V. Although I have some information about this shutter it does not tell me wich connector is the + pole and which is -pole.
From some pictures I have seen of the compartment and how it would fit on the shutter it looks as if it is the top connector on the shutter that is the +pole (looking straight on to the shutter with the connectors pointing out to the right side).
Help me please, THANKS!
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