This ring flash LED is really very good, Of course the use of this limit or Macro photo at distances of less than 1 m, but at this price the quality is very correct and very complete equipment. the syncro works very well even at 1/100 th of a second with a brief D800 will like me you do not use it to open a portrait type of picture that is not a very expensive alternative that fill his office. only negative battery consumption seems important. I recommend this product