Explained - What is the difference between S1 and S2 Slave modes on camera speedlights/flashes?

Shop for Speedlights with S1 and S2 modes for great deals on GearBest: http://bit.ly/gearbestspeedlights and Amazon: https://geni.us/75Tr7tA (Amazon) Simply put, when the flash is set to S1 mode, ANY flash (including the pre-flash) will set off the speedlight flash. In S2 mode, the pre-flashes will NOT set off the speedlight flash; only the final, actual flash will set off the speedlight flash. - - - - - - - - - Visit http://www.TutorialGeek.net/ for more tutorials and reviews ================================== Music Credit: Tobu - Calling -    • Tobu - Calling   Intro Credit:    / alexbau01   - - - - - - - - - - - - - Amazon Affiliates Disclaimer:TutorialGeek is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com