First things first, open up the flash adapter packaging. Inside you’ll find a cable and then the flash adapter itself.
Connect the cable to the flash adapter.
Connect the cable to the flash adapter. Plug the larger end in to the flash adapter. Only one end of the cable will fit the jack.
Slide your flash onto the hotshoe on the flash adapter.
Slide the flash onto one of the hotshoes on the flash adapter. If your flash has any sort of locking switch or ring, make sure the flash is locked securely on to the hotshoe.
Connect the flash adapter to the Triggertrap Mobile Dongle.
Connect the other (smaller) end of the flash adapter cable to the Triggertrap Mobile Dongle.
Connect the Triggertrap Mobile Dongle to your iOS Device.
Plug the Triggertrap Mobile Dongle into the headphone port of your iOS device and launch the Triggertrap Mobile App.
Turn the media volume up to 100%!
You can either use the volume buttons on the side of the device, or slide up from the bottom of the screen and use the control centre.
Set the flash to manual.
Hit the mode button until the mode readout displays M. This is important: if the flash is left on TTL it won’t play nicely with the Flash Adapter.
Test the setup.
You can easily check to see if your setup works with the Simple Cable Release mode in the Triggertrap Mobile app. Open the Simple Cable Release mode and hit the big red button. If everything is set up correctly the flash should fire. If not, then go through the above steps again to make sure everything is in order.