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<blockquote data-quote="WayneF" data-source="post: 135084" data-attributes="member: 12496">The only way to know without doubt is to measure it yourself.&nbsp; You probably have some friend who has a $10 voltmeter - take the flash over there and let him do it.&nbsp; &nbsp; &nbsp;&nbsp; With the flash off camera and not connected to anything, but turned on, just measure the DC voltage from the center pin of its foot, to the steel foot, or if plastic foot, to the the metal side contact (which touches the camera shoe frame).&nbsp;&nbsp; This likely may trigger the flash, so don't aim it at your eye, or lay it on anything the heat will likely scorch. Read last sentence again.&nbsp; Just aim it off into the distance.&nbsp; Triggering it is no problem, that's how it works, and shorting that center pin is what triggers it (so expect that).The meter need not be particularly accurate.&nbsp; Test it on a 1.5V flashlight battery to know it works.&nbsp; You are just looking for a low sync voltage, like 5 or 10 volts, or a high voltage, like 150 volts or more.&nbsp; A precise value is not important.Here is a good article<a href="http://aaronlinsdau.com/gear/articles/flashvoltage.html" target="_blank">New Century Expeditions - Flash sync voltage on the hotshoe x-sync connector</a>and there are others (search Google for&nbsp; Measure flash sync voltage).&nbsp; It is very simple.&nbsp; Just don't blind yourself, or scorch anything.&nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" loading="lazy" data-shortname=":)" />The Nikon DSLR are rated to 250 volts (D3100 manual page 172).&nbsp; Search any Nikon DSLR&nbsp; PDF manual for&nbsp; 250 v - they all say this.</blockquote>

[QUOTE="WayneF, post: 135084, member: 12496"] The only way to know without doubt is to measure it yourself. You probably have some friend who has a $10 voltmeter - take the flash over there and let him do it. With the flash off camera and not connected to anything, but turned on, just measure the DC voltage from the center pin of its foot, to the steel foot, or if plastic foot, to the the metal side contact (which touches the camera shoe frame). This likely may trigger the flash, so don't aim it at your eye, or lay it on anything the heat will likely scorch. Read last sentence again. Just aim it off into the distance. Triggering it is no problem, that's how it works, and shorting that center pin is what triggers it (so expect that). The meter need not be particularly accurate. Test it on a 1.5V flashlight battery to know it works. You are just looking for a low sync voltage, like 5 or 10 volts, or a high voltage, like 150 volts or more. A precise value is not important. Here is a good article [URL="http://aaronlinsdau.com/gear/articles/flashvoltage.html"]New Century Expeditions - Flash sync voltage on the hotshoe x-sync connector[/URL] and there are others (search Google for Measure flash sync voltage). It is very simple. Just don't blind yourself, or scorch anything. :) The Nikon DSLR are rated to 250 volts (D3100 manual page 172). Search any Nikon DSLR PDF manual for 250 v - they all say this. [/QUOTE]

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