If you would like to find a waterproof camera, Canon already produce a new PowerShot D10. This is a point of shoot camera with water resistant ability. This camera have 12.1 megapixel and can be use in water up to 33 feet, and also can be use at as cool as 14 degree Fahrenheit. I think this camera enough for kind of under water hobby which is maybe need to take a picture inside water without special case of camera.
Canon PowerShot D10 have 3x optical zoom, beside of water resistant, this camera also dust resistant and shockproof. Like other new Canon digital camera, this camera use latest technology for image processor which is known as DIGIC 4. This image processor can make the camera run faster in respond and give a good result of images quality.
The LCD size is 2.5 inch with PureColor technology and 230.000 pixel, and shield with 2mm protection. The LCD size is big enough for preview object before capture and review the captired moment and also for setting the menu of camera. This Canon PowerShot D10 have Motion Detection Technology of Canon, which can help us to detect the motion object to obtain the blur result. This camera use memory card SD, SDHC for bigger size, and MMC memory card.
We can choose ISO type from Auto and manually ISO number start from ISO 80 until ISO 1600, for ordinary situation usually using Auto ISO setting is good enough, but is we want to make our own result, we can choose manual ISO, if the condition is less light or litter dark, better to use high number of ISO, but the image result will have much noise then using lower ISO number. Battery of this camera using NB-6L Rechargeable Li-ion Battery and the wight is 190g without battery.
Beside of taking a picture, this Canon PowerShot D10 also can capturing movie with max resolution 640x480 at 30fps, this is good for movie recorder and continue movie without lag. File format for movie is Mov and for picture is JPG.