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4 pin Nikon hot-shoe proprietary connector layout
4 pin Nikon hot-shoe proprietary connector


1 X trigger contact
2 Rdy Ready to fire
3 Q Quench or TTL stop
4 SP Speedlite present (monitor)
mount shell GND Ground (Earth, Common)


According to 3 reports in our database (3 positive and 0 negative) the Nikon TTL Hot-shoe interface pinout should be correct.

Is this pinout
Nikon TTL Hot-shoe interface visual pinout:click to enlarge
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