There are plenty of decent, affordable cameras on the market these days. Not all of them can handle extreme conditions though. The Olympus Tough TG-6 freeze proof, crushproof camera is ready for all your adventures. It is waterproof to 50ft, shockproof (7ft), and freeze proof to 14F. It can record 4K and full HD 120fps video.
In Microscope Control Mode, you can achieve magnification up to 44x. The camera has 5 underwater shooting modes. It lets you record data from sensors such as GPS and compass and sync them to photos and videos. Easy sharing via app is available.[where to get it]