Question about Vivitar 840AF AutoFocus Zoom Electronic Flash for Canon EOS Camera Flash
I read on one blog that sync voltages of older flash units can fry DSLR cameras.
That is true. Older flashes used sync voltages as high as 250V. That much extra juice can quickly fry newer cameras. You can use a Wein Safe-Sync between the camera and the flash to electrically isolate the two.
Posted on Jan 24, 2010
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Posted on Jan 02, 2017
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