Setting aside where you are in diving learning curve...
Do you have the external strobe or just the one that is built into the camera? 4 feet is a long ways underwater. If you have an external the first thing I would check is that it is pointing in the right direction. Very easy to have it not be...
Do you have the external strobe or just the one that is built into the camera? 4 feet is a long ways underwater. If you have an external the first thing I would check is that it is pointing in the right direction. Very easy to have it not be...