Lia Roozendaal
I bought this flash because I had small project where I needed high-speed flash. While the flash fires at high speeds it produces very small pulsating shadow lines across the ENTIRE image. It seemed to produce these lines at all high speed settings. It might be that the flash duration on the high speed setting was a little off or not producing enough power during the high-speed pulse. In any case, I tried it at full, half, and a quarter power. Lines where visible across all setting. It fires great at 250th and below and the trigger worked flawlessly but had to return because of shadow line issue. Will take a look at the AD200.