I'm brand new to both diving and underwater photography. However, I've been taking above-water photos for years, so I'm really excited about doing some underwater work.
Right now I'm thinking of getting an underwater housing for my RX100 - probably either the Ikelite or the Nauticam.
Has anyone done a comparison test of wide-angle conversion lenses for compact cameras? I'm curious about how the Bluewater WA-110 compares to the Ikelite W-30. I'm also curious about how the W-20 and W-30 compare, since the W-20 is about $175 cheaper.
What sort of filters do I buy for these lenses? I haven't seen any photos taken with a wide-angle conversion lens and a blue or green water filter. Are there filters that fit right over them?