I am traveling next week and am going to be using the canon 500mm lens on a wimberely gimbal head using a 580 ex2 canon flash with a better beamer (see arthur morris' website www.birdsasart.com) My question is most people mount their flash with better beamer not directly on the camera but on a seperate collar either on the tripod head or a collar that fits on the lens. The problem is i am renting both the 500mm and the gimbal head so i cant kust purchase one of those flash collars. am i still going to get the same results by just mounting the flash with better beamer directly on the camera hot shoe? let me know if anyone has any suggestions on this topic. Thanks.