Pentax Optio S4i review
I have had this camera for 2 months now and love it. I have also purchased the underwater housing and taken over 500 UW shots with it. It does have a marine mode especially designed for UW photography which is nice. Unlike many others on this forum, i rate the image quality good.
My only negative comments would be a lack of infrared lamp assist and slow recharging time between flashes. I guess you can't have everything. LOL