I did notice that there is a way to put the cp 4300 into "sleep mode" while in the fantasea housing. Press the "monitor button" twice and it sleeps, once and it wakes up. It'll really make your battery last longer.</
You're not putting the camera to sleep by doing that; you're just turning off the monitor and suspending continuous auto-focus. For example, if you half-depress the shutter release while in this mode you'll see the auto-focus is still working. The camera is not really asleep, although turning off the monitor does conserve power. From "off" to "on" takes about 3 seconds in this mode. This conservation measure may be enough for some, but maybe not enough for others.
It's easy to program the camera to actually "sleep" after a predetermined interval. In "setup", go to "auto off". You can choose intervals of 30 seconds, 1 minute, 5 minutes, or 30 minutes. The camera will automatically shut off after the predetermined interval. A tap on the shutter release brings the camera back to life. While diving I typically use 1 minute auto-off to maximize battery life. As I approach a subject that I think I might want to shoot, I tap the shutter release even before I'm in position, so I don't have to wait; it'll be up and running by the time I bring the camera up to my face. It becomes second nature after a while. And the best part is that you don't have to think about turning it off; it's automatic. From "off" to "on" takes about 4 seconds in this mode, so it does take a little bit longer than the monitor-off strategy. But it's only 1 second more
Rick.