Find out how to set your Nikon Speedlight in optical slave mode (SU-4 Mode) to make it hearth simply utilizing one other speedlight (even the little pop one in your camera).
The entire tutorial at:
source
Find out how to set your Nikon Speedlight in optical slave mode (SU-4 Mode) to make it hearth simply utilizing one other speedlight (even the little pop one in your camera).
The entire tutorial at:
source