I use the 44 AF-1 on my Sony a7. together with the lens 24-70mm arise in Automatikmudus perfectly exposed flash pictures, as the electronics from Sony can be included in the calculation of the flash output level, the focus distance. So far I have not had a correct exposure! If you want to manually flashes, this flash is not the first choice because it offers only a few levels, other manual flashes can be controlled in 1/3-step. But I think that this is not the target audience of this unit anyway. The whole process seems to be exactly robust. Made in Germany halt. The flash can be easily attached to the camera and rotate in different directions. Overall, I find the Metz flash at this price excellent!