MR-58 LED macro ring flash is a new design of Yongnuo which has LED and Flash two mode. It contains 58pcs high brightness LED and suits for all Canon, Nikon, Pentax, Panasonic and Olympus DSLR cameras. LED macro ring flash light ( LED Mode ): Mount the controller onto the camera and the macro ring into the lens, you can adjust the LED Light to get special lighting effect through 7 levels brightness adjustment. When it's a full light, there is no shadow in macro photography, you can take photos of still life, flowers and insects at close range as well as photography of special field such as dentistry. You can also use the light mode to take videos at close range. Lower guide number flash speedlite ( Flash Mode ): Mount the controller into the camera, and macro ring into the lens, set up the flash mode, and then you can use it as flash speedlite.