Yesterday went to the Underwater World in Sentosa, toke some picture using my D50+18-135 len(D80 kit len)+built in flash. and found 90% of the picture is all blur. if the flash used, the picture was messed by the reflect light of the glass. if no flash, then the face of the man will be very dark as the blakgroud is very bright (fish tank is lighted inside).
Is a more power bounced flash is the way to this kind of situlation. Appreciate all the advice. Thanks.