Optiean Sales is pleased to offer you a variety of unusal strobe lighting accessories to help you create unique lighting for your underwater photos. They included ring lights, snoots and other light "shapers".
Then I tried a Panasonic LX-100 out. I was impressed by it’s super sharp and fast Leica f/1.7 lens and large 1 inch sensor. The camera has direct controls for ISO, notably lacking in the Sony RX100, and a unique and intelligent way you can switch into auto aperture or shutter speed simply by moving their dials to the end of the settings. No mode dial necessary.