Hello,
all these pics were done with the internal flash of the camera ... it's a PENTAX K20D, a really wonderful machine! I had done thousands of pics with this camera since spring 2008 but i'm using only the ones i think they are special. Nearly every pic is sharp, if a pic is failed the reason will be a wrong parameter after photographing outdoor scenes ore anything else non-aquaristic.
Greetings
Uwe