Chances are you've seen their photos, purchased their calendars and admired their ads. Many of the world's greatest aviation photographers gathered in Las Vegas, NV last weekend for the 4th annual International Symposium of Aviation Photography (ISAP). Their goal, to share the knowledge and experiences their career has provided them. More than 150 photographers from around the world attended the three day symposium aimed at teaching better business practices, learning a digital photography workflow and maximizing the quality of images offered through the digital medium. Speakers who shared their knowledge included Paul Bowen, George Hall, Katsuhiko Tokunaga, EAA's Bruce Moore and Jim Koepnick as well as representatives from Nikon and Canon and many others.