I am new to underwater photography and have bought a DX-1200HD. I read a few threads that said it "froze up" during dives. I just returned from Cozumel and made 10 dives(40 to 105') with the camera with no problems. I hope that they have fixed the problem. I enjoyed the size and ergonomics of the Mariner Pack. The photos show that I need more practice(darn the luck, I will just have to dive more!!!!). I am looking for a red filter though. Any ideas? Thanks