Or not ??
The flash has a built-in radio receiver, which you can save to buy a separate receiver depending lightning. Unfortunately not radioed this with my yongnuos 603, at the Nikon D7100 :(
Hours of looking for clues on the Internet always yielded the same result. Just turn it on, Channel 1 (or the same channel generally choose) and go to the switched-on camera.
After eternal Try and try around, I ran into the Channel 3 as the connecting channel between the devices.
All's well that ends well.
Positives:
- Absolute professional device for mini purse
- Wertig processing
Negatives:
- Annoying search for the right channel
Nevertheless:
It was worth the purchase! And I'm going to buy myself another 2 of these parts - to get in the hope the right channel there.