I'm using the Yongnuo Flashes for some time and has always been very impressed by the quality and reliability. The manual control without TTL brings for practical photography more advantages than disadvantages, because it is delivered no autoexposure, which provides in some situations incorrect exposure results. The YN560-TX Wireless Flash Controller also makes it even easier for distributed Yongnuo YN560-III flash units from the camera when it comes to flash output and zoom perfect control. It could not be any more. In addition, there is a 1 / 250s or even 1 / 320s (Olympus E-M1) is the 603er mode also possible to exploit without the power or the image will be affected by a black bar. For other wireless flash systems that is not always the case, even when datasheets promise something else. On the whole, I am more than satisfied with this solution and can recommend them to anyone strobist very.
