This ring flashlights from CSI, NCIS and other crime series are known. The forensic scientists always do with it, the crime scene photos. This ring light / flash is very useful for macro shots, where you have to get close. It prevents the shadow of the camera and the object is illuminated from good. The light / flash intensity is adjustable. Likewise, it can also be just the left or right flashes. Useful as a video light. Adapter rings for many filter threads are. The manual is unfortunately only in English and Chinese. I (still) want to spend money on an expensive macro lens, I content myself with the temporary solution of macro rings, 50mm and FBW this ring light / flash. And I mostly use the light, so that I can ever focus, the AF illuminator uses at short distance absolutely nothing. The battery indicator is for batteries (1.5V) and not for batteries (1.2V) designed. Therefore, the display in battery is never "full" view. No professional quality but excellent price / Leistungsverhältinis For the price you can not go wrong. A few of my macro photos at this link: Automatic intermediate rings 3-piece for macro photography to match Sony Alpha A57, A58, A65, A77, A99, A100, A200, A230, A290 (metal bayonet)