https://vimeo.com/61322000 link to snippet shot in a cave that runs thru a pinnacle off Cocos Island with a sonynex5n. at 3200 iso video the sony really works well to film inside this cave. there must be 5000 fish moving around the cave. For me, it was one of the nicest dives of the trip. Used the sony in a nauticam housing with a nikonos 15mm lens . Light and Motion 4000 lumen u/w video light brought out the colors like you are right there on the dive.