I found this post about a hack to regulate the power of an old Vivitar 283 flash.

As I own two unmodified Vivitar 273 flashes, I wonder whether there is a similar hack to modify this model as well to be able to regulate the flash light output power?

  • \$\begingroup\$ Clarification: Are you wanting to regulate the light output power of the flash or the trigger voltage? \$\endgroup\$
    – Michael C
    Feb 24, 2017 at 20:42
  • \$\begingroup\$ The light output power. For lowering the trigger voltage I found some instructions already. \$\endgroup\$
    – andreas
    Feb 25, 2017 at 9:27


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