Hi, I thought about my tips and would like to make the list a little bit longer :blinking:
There will be a learning curve over the time/ dives. So, practice is one key element to get better results. From my point of view here are some hints and tips:
1) O-Ring and preparation: not too much lubricant, take your time for inspection before closing, don't open on e. g. zodiacs, close with good light around you (little LED light is helpful). Try the cam after closing the housing.
2) Don't shoot into the blue downwards
3) A shark 20 m away is nothing but a proof
4) Try to use the manual focus, pumping focus is sometimes a bad surprise afterwards
5) Don't zoom to much, get close, use a high quality wideangle, at least 80-90° or more, fully zoomable is better
6) Balance your housing. If it is neutral or sligthly negative and doesn't flip you will get more steady shots
7) Try to think about a little story board before the dive: preparation, the jump from top and from below, other divers etc. Perspective: long shot --> semi long shot --> close. A good combination of shots doesn't need artificial transitions.
8) Red filter is good for blue water, there are others for other conditions, your housing will have a good one.
9) A lamp is good. A normal hand lamp is only usable with buoyancy devices. There are many solutions on the market. Recently, I saw a LED ring which is mounted around the port.
10) Sometimes I count from 1 to 10 during the shot to get enough footage.
11) Try to play with perspectives. E. g. You can film a diver over the reef or you can film a diver over the reef from beneath through a coral or with a coral left or right in the picture.
12) Don't forget the corals and animals......don't kill them
13) Move slowly and be quiet or simply don't move. Don't hunt sharks or other animals, try to wait for them to come to you. Other divers will also thank you.
14) Stay away from big groups, try to find a suitable buddy with patience. Sometimes good shots need time.
15) Don't go to deep. The camera "needs air". I only go as deep as it is necessary.
16) Not really necessary to mention again: your dive skills, buoancy should be very good
17) Learn to use the cam on land, try it with the housing on land and in the pool.