DSLR Settings + Flash Settings
MAKE SURE AUTO POWER-OFF IS DISABLED!!
https://www.pbisupport.com/help/how-to-disable-auto-power-off
The Normal ISO is 800 But if the picture comes out too bright change to 400. ISO Is light Sensitivity.
Depending on what booth you have, Specifically for the Mirror 3, you can adjust your ISO to 1600 - 3200 when using the ring flash. If using the external flash provided you can then use 400-800 ISO since the external flash is strong rarely needs 1600 ISO. Depending on lighting of the event.
Flash & Tripod Setup for Photo Booth
Getting to know your Flash
Flash & Tripod Setup for Photo Booth