Protect your Camera from Voltage Spikes

Digital cameras, by their electronic nature, are highly susceptible to being damaged by voltage spikes.  Camera manufacturers recommend no more than 6 volts to set off a flash either by hot shoe or PC connector.  Some older flash units may be as high as 280 volts (as reported on the Vivitar 283).  Some old units are in the 20 to 30 volt range and will not necessarily cause immediate problems but over time can damage the sync contact.  Many older flashes, especially studio strobes, may be as high as 50 to 60 volts.  Although we cannot vouchÂ
for these products they seem to be designed to help reduce the possible damage to cameras by high voltage sync.

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