Use this ring light, among other things with a Canon EF IS USM 100 and am very happy with the results. The light output is not comparable to a pure ring flash, but where no flash is allowed, you can achieve very good results with this lamp. Have a butterfly house and pictures made since this light is absolutely top. The flash should be used with caution, since no TTL is controlled, ie the flash fire his volley "fully" without regard to the aperture and shutter control of the camera. Here you have to practice to get good results.
