A set consisting of the RF-11 ring flash and FC-1 macro flash controller. Discover how soft and shadow-free your close-up photos can be with the SRF-11 Ring Flash, utilizing a circular tube as its light source for just the right amount of illumination. Guide number of 36 feet/11 meters at ISO 100. Ideal for medical and macro photography. Includes a case that accommodates both flash and controller units.