I had hear that for underwater photography there i some lens for a clear vision an photography...

If the water is murky there's not much you can do - lights won't throw much distance.

Thanks for the reply..i was wondering the type of lenses that they are using for zooming and all...

Hey i dint have a clear idea of underwater photography..i searched in the net and found that there is fiber case for the camera which is water proof..will that be efficient enough...?