useful features and easy to handle

Value for money is very good. The application is almost self-explanatory. Therefore, a good thing, because the manual does not really help in Chinese and Japanese. The English BDA has been very scarce.
Many Obkektivringe going from 49-77mm. To ensure that all lenses are covered. Helpful also possible to disable the one half of the light ring. The brightness control is useful.
But let no one come up with the idea to try shooting in automatic mode. Then there's a merciless overexposure. So better "TV" to work in "M" or "AV" or.
Can be used when the flash is so focal length from 50mm, previously there shadow edge through the ring. So all macro lenses fit from 60mm to 180mm.
The mounting option directly on the control unit is also extremely helpful. Of course, the ring flash does not replace the normal stronger flash, Canon 430 EX II with me. The range is very limited. But for macro shots of the ring flash is very well suited.
Buy recommendation!