Before you start digging into the reviews, a few notes on choosing a cam that's right for you. You'll definitely want to consider frame rate, expressed as frames per second (fps). Some action cameras offer up to 240fps recording, while others only go to 30fps. For standard playback, 30fps is perfectly fine. It's when you want to slow footage down in editing to create dramatic scenes that frame rate matters. Footage captured at 240fps can be slowed down and played back smoothly at one-quarter speed. You may also want to go for a cinematic look, in which case you'll want one that has a 24fps capture option, the same speed used by most Hollywood productions.
The Olympus TG series has a sterling reputation among the tough camera market, not only for being sufficiently specced to handle tough conditions, but also equipped with impressive imaging and video tech. The Raw-shooting, 4K-capable TG-6, is a fairly minor upgrade on the previous TG-5, but adds some nifty new features like improved LCD resolution and a new Underwater Microscope mode for getting in close. Producing 4K video at 30fps and offering the option to shoot Full HD video at 120fps for super-slow-motion, the TG-6 also has a generous 25-100mm optical zoom lens that lets you get closer and closer to the action. It's got a chunky handgrip providing a secure hold on the camera, while the internal zoom mechanism means the lens never protrudes from the body, protecting it from knocks and bumps. Straightforward but sophisticated, the TG-6 is quite simply the best waterproof camera around right now.