Best underwater camera : Olympus Tough T-G6 Why It Made The Cut : Thanks optional light guides flash diffuser accessories , waterproof camera one best options low-light shooting underwater.Key Features Sensor : 12 megapixel , 1/2.33-inch BSI 12 megapixel , 1/2.33-inch BSI AF sensitivity : N/A N/A ISO range : 100-12800 Pros Waterproof , freezeproof , rugged construction Compact 4K video capture capabilities Cons Small sensor size Not great all-around use If love shoot underwater , probably already know deeper go , less light work with.The Olympus TG-6 waterproof 50 feet without waterproof housing becomes waterproof 147 protective housing.Of course , lose lot light far underwater , thankfully , niche camera challenge.A bright LCD screen help compose underwater , optional light guides flash diffuser accessories help keep things nicely lit without disturbing aquatic scenes .