i think some of u were asking whether to use the sb900/sb800 original diffuser a few post back.

lemme give my 2 cents based on my experience. when in a hall and u're pointing the flash upwards to bounce from the ceiling, it's best not to use diffuser if u want even lighting with no shadows. using diffuser will send some light forward, causing the shadows.

however, the diffuser might help in diffusing the light a bit if u were to point it forward aka direct flash.
those demb flash diffuser works differently than the stock diffuser. the demb flash diffuser works by sending light upwards to bounce but also reflecting a bit forward to light ur subject. it gives ur subject a bit of brighter illumination and also some catch-light in the eyes.

any comments on this? right or wrong?