After 3 years, Canon have updated their waterproof camera, the D10. Now, the PowerShot D20 comes with a larger 5x optical zoom, the same 12 megapixel resolution and a slimmer, squarer body. The sensor has new HS technology for good low light performance and there’s also a 3 inch LCD screen. The protection that the camera gives has also been expanded and in this test, we’ll be seeing if it can step up to the mark. The Canon Powershot D20 costs £299.99 / $349.99 and is available in blue, yellow and silver.