I have been shooting skateboarding for some time but have always felt rather limited by only using available light. I want to start shooting with flash off camera on a bronica SQ-B with an 80mm lens. I am looking for something with a short flash duration that can freeze action well without getting expensive studio lights such as lumedynes or einsteins. The bronica’s high sync speed of 1/500th of a second will be great for cutting down the bright daylight but correct me if I am wrong, the flash duration is what is responsible for freezing action. Any recommendations for affordable flash guns (without TTL—no need for it) that have a short flash duration at full power? Or is my best bet just to get multiple speedlights and power them down to make them faster? I was thinking that a fast duration at full power would be useful for keeping the flashes at a safe distance from my subject and balancing the sun. I was thinking about the Yongnuo 560 which according to this article (http://gock.net/2012/01/flash-durations-small-strobes/) has a pretty short flash duration when powered down but at full power seems adequate (at about 1/300s). And here (http://speedlights.net/2010/07/14/yongnuo-yn-560-speedlite-review/) there is a chart showing how these are among the fastest at full power when rated using t.1. Anyone use these for skating/other fast action shots with good results? It is difficult to find accurate information about flash duration as there is a lot of speculation on the web and there are two rating systems (t.5 and the more reliable t.1) that complicate matters more. Thanks!