Dave Black is a professional photographer who shoots some of the most stylized sports images I have ever seen. In this BTS video, Dave is pairing up 8 SB900 flashes with two Radio Popper PX triggers on two Lightware Foursquare brackets. Why does he use such a crazy setup when shooting motorcross? Often times with fast action sports you need to shoot with quick shutter speeds beyond the 1/250th of a second flash sync limit. The only way to do this is to use the FP high speed Sync mode Nikon (and Canon) flashes offer when hardwired to your camera. Luckily Radio Popper (and Pocket Wizard for Canon) have created wireless radio iTTL/eTTL syncing which gives you the ability to us High Speed Sync with your flashes off camera over long distances. This setup is about as complex as you can possibly get (and expensive) but Dave has made a great video showing off the setup. Unfortunately he does little to explain WHY this setup is necessary. Head over to his Lightware Foursquare / Radio Popper Post to read more about how it all comes together and be sure to check out Dave's portfolio as well.