The TG5 is a very popular camera for underwater photography and having the right accessories for it alongside understanding the settings you can use will give owners better results.
What makes a good underwater camera ? Part 3 The ability to add a wide angle lens
When shown someone's underwater pictures and asked how to improve them the most common thing the Alphamarine team find themselves saying is 'get closer'. Reducing the distance between you and your subject means less water between the camera and what you are photographing. What a wide angle lens allows you to do is frame the same subject in your picture but from a much shorter distance.