The ISO 10330 specification (“Photography – Synchronizers, ignition circuits and connectors for cameras and photoflash units – Electrical characteristics and test methods,” 1992) says that all ISO-compliant cameras should be able to accept trigger voltages up to 24V. (According to some opinions, high voltages can even endanger mechanical cameras, albeit after years of use) Ron Alexander claims his Fuji is astonishingly tolerant of high voltages… interesting (This has since been verified by Rob Scrimgeour of the forum - their members got a message from Fuji also stating the 400V center pin limit). Pentax users may want to read this related story from Gene Poon. Marco Fortin-Metzgen checked with Olympus Europe on his C4040 - that digicam has a trigger voltage of 10V, so Olympus too recommends strobe triggering in the 3V to 6V range. I’ve heard some rumours that some Coolpix models have been restricted to 5V! (see below for more details) Similarly, Nikon has specified 12V for their speedlight circuits… (though reader Steve Francesoni called Nikon.uk to check, and their tech rep said that his N80 was good to 250V - so there may be more complexity to this story).
It contains a table of strobe trigger voltages, a few measured by myself but most contributed by readers of this site, along with some information about specific camera makes and the strobes that light them: Camera Info (as of around 2005)Ĭanon US has verified (to me, and here) that the Powershot G doesn’t like voltages over 6V. How much is too much? What voltage might my own strobe generate? This page tries to help answer those questions. For mechanical cameras, this is fine - but many newer, electronically-driven or digital cameras can be damaged by excessive strobe voltages. Some older strobes (and infrared strobe triggers) use high voltages in the trigger circuit.
Is your old strobe safe to use on your new electronic camera? If you’re really in doubt, just get yourself a new Godox and be very happy. The list is still hosted here but rarely expanded. Many of the companies listed (and the links to the contributors) have been gone for years (Hi Monolta!). This list was originally compiled around 2001 to 2005, using generously crowd-sourced measurements.
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