Masaki - As noted at the top of the index page for those phtos, those were all taken by Dominique Tehei, our instructor/divemaster. We (my wife and I) got certified to dive on this trip. I thought about it but decided I had enough to worry about without having a camera too. I am not sure what kind of camera Dominique had, it was a compact point and shoot digital camera I think with a wide angle lense attachment. I think it was an Ikelite housing and he had an external strobe too. Sorry not much help.