I have a focus FC-286N speedlight for Nikon. What does the SL/off switch do on the back? I cannot find any reference to SL anywhere on the internet.
The last few times I have used this speedlight, it has gone berserk! It flashes when it wants to and just...crazy! I turned this SL button to "off" and it seems to have settled down. What does it stand for, and what does it do? And why can't I find out anything about this anywhere?