Protects the rear of Hasselblad camera bodies, including the ArcBody and FlexBody. The internal surface is painted with a color similar to normal film emulsion, which is very useful when testing a flash using the TTL/OTF flash metering system. Small holes at the corners of the 6x6 cm format make it possible to visually check for vignetting. Supplied with D-Flash 40 and all camera bodies.