Opteka RL-300 Macro Ring Light for Canon PowerShot S5 IS, S3 IS, & S2 IS

I am dentist and bougth it for clinical macro photography, as it's descriptions announces. But is not good because it's light is so cold and the resultant colors become far diferent from original, even after changing white balance in the camera.
The light only focus at the center of the scene if the camera is 20cms or more from it, and you will have light only at the very center, not at the edges of the scene. At this distance, with the Canon S5 iS you will obtain much much better macro pictures using the built in flash.
Not recommended.
Buy Opteka RL-300 Macro Ring Light for Canon PowerShot S5 IS, S3 IS, & S2 IS!