The studioking diffusor ball sk-db300 is an accessory for your flash unit, which allows you to break up the harsh light of the flash. this results in a nice, soft and even result. the diameter of the sphere is 30 cm, so the light is spread nicely over the whole image and you will not see any strong shadows. the sk-db300 does not have an exchangeable speed ring. Application studioking diffusor bulb sk-db300 The sk-db300 is easy to place on flash units with linkstar s-bayonet (bowens). a diffusor ball is ideally suited for passport photography, because you want no shadow. in addition, diffusor balls are also suitable for making product photos. on the back of the diffusor ball are holes, to allow any heat to escape. this prevents the diffusor ball from melting. note that the maximum continuous light bulb to be used is 60w. If you want to use the sk-db300 in combination with another brand of flash you will need the ddbw-ex with an adapter for the flash itself. in addition, there are also ready-made adapters that you can attach directly to the diffuser ball and flash. these can all be found in the optional accessories.