Full Size Flash (YONGNUO YN560-IV)
"What we have here is a failure to communicate TTL" But that should not stop you from making good use of these lights, at this price this is a bargain. Use the flash in manual mode to stop action. What we have been finding is a lot of people have been finding this particular brand of Yongnuo super useful as off Camera strobes for portable shooting, indoor and outdoor.
This light can be trigger off body with most cameras pop up flash, but if you want redundancy then make sure to pick up a set of wireless radio triggers, and perhaps a light stand, hot shoe bracket and umbrella.