Hello Haroen...what I've experienced is that shooting towards the sun takes a strong flash strenght and uasually it picks up the sediments floating around...having the sun behind you and using the no flash utilizing on most bright days f4...Ev minus .07 and mode to be in underwater scene...no flash usually does justice...and depending upon your subjects distance from you...you increase the EV...G10's a very good camera...nice silhouette my man...P.S. try super low tide waveless days for the shoot...
