The 22HOBD is designed to project a narrow 45° beam angle, with about six times the efficiency of a white dish. This allows for lighting subjects from greater distances with low power flash units, and allows using the reflector with or without the included direct-light blocker. 

Attaching the included diffusion sock converts the 22HOBD into the equivalent of a round softbox with very even coverage and outstanding evenness across the face of the diffusion fabric.  This widens the angle of coverage to about 150° and lowers the output by about 1 1/2 f-stops.  It also minimizes the specularity and results in approximately the same photographic result as a conventional white beauty dish with diffusion sock