There are many different types of digital cameras on the market but not all of them will fit your application. When buying a digital camera you want to make sure that you get one that fits the application that you need it to fit. If you need waterproof digital cameras make sure that you purchase that type of camera because if you don't purchase a waterproof camera and you use it around water you could end up with a very expensive brick of a camera that no longer works. You are lucky because there are several different waterproof digital cameras on the market. They come in all different price ranges. The price of them will determine the feature set that they have. Just like in regular digital cameras the price typically reflects the technology that is within the camera. The more you pay the more image quality you typically get. So do not expect to buy a cheap waterproof digital cameras and expect for it to work as well as a more expensive one. But with that said you do not need to break the bank to get a quality waterproof camera that will fit the application that you need it to fit.
What we advise you do is to learn everything about the different waterproof cameras that are on the market. There are many different brands who offer these cameras and they are not all created the same. Some brands are much better than others and have a much better reputation. One way to ensure that you get a quality camera is that you rely on the experiences of other people. Read as many reviews that customers who have bought these cameras have to say because they can tell you the truth about the camera. But with that said you cannot rely on just one single review or a handful of reviews to determine if a camera is any good or not. You need to read as many reviews as possible to determine if it is the right camera for you.
As you do your research on the quality of cameras you also need to learn about the different features and benefits that they have. You need to figure out what all is available in waterproof cameras and what features do you really need and want. You'll be able to find many articles and video reviews that will help you determine this. Don't waste money buying a camera that doesn't have the features you need or want and don't buy too much camera if you know that you aren't going to use all the features. So basically buy what you really want and need above anything else.