Sun 13-Sep-09 06:59 PM | edited Sun 13-Sep-09 07:01 PM by gkaiseril
Welcome to Nikonians,
First, the voltage provided by the flash unit to the hot shoe can vary from 12 VDC or less to over 200 VDC. The digital cameras using solid state circuitry are designed to work with much lower voltages than the old film cameras that used mechanical switches. And that is why Nikon prints the following in all dSLR manuals:
>Use Only Nikon Flash Accessories
> Use only Nikon Speedlights. Negative voltages or voltages over 250V applied to the accessory shoe could not only prevent normal operation, but damage the sync circuitry of the camera or flash. Before using a Nikon Speedlight not listed in this section, contact a Nikon-authorized service representative for more information.