The zs3 is a terrible uw camera. For still, you don’t have manual, so it’s very difficult to use a strobe efficiently. It’s diffuser is too small, and still backscatter. It focus speed is really slow, and macro mode doesn’t work well uw.
For video, its uw mode is very red and needs to be adjusted all the time. Same, it is slow. Also quality is not that great with acvhd lite
The pana housing is not very good quality. It doesn’t go below 40m, and after a year, some switch will stuck below 25/30m
Now … it is a less than 500$ total system and from that angle is absolutely unbeatable. Also been using it for almost 3 years and love it. Thinking about an upgrade for several reason, but anything significantly better will cost 5x min, and will be much larger.
It is an outstanding entry P&S underwater system, especially for video. With some external light (sola, or HD with diffuser) you can actually get decent still.
I think now the zs10 would be the same and offer manual + 720p60 for same low price.