| 摘要 |
An electronic flash unit with flash energy adjustable by switching on or off storage capacitors interconnected in parallel which are connected to a high-tension source. For increasing the number of flash energy stages (guide numbers) obtainable with a definite number of storage capacitors an energy switch is provided with whose contacts the storage capacitors can be as required connected in parallel and are at the same time connectable at various high potentials of the high-tension source.
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