What underwater cameras do most divers use?

[Even]

I don't know what kind of cameras to use when shoot underwater images.The brand name are too expensive for me.
What are the most important to choose a good one?I don't want a too big camera.

 

[Bubbletrubble]

Lots of divers, including myself, like and own Canon digital point-and-shoot cameras.

I have a discontinued model, the A570IS, which has several modes: auto, manual, Av (aperture priority), and Tv (shutter priority). I use it in conjunction with the Canon UW housing WP-DC12, which is a fairly small, lightweight case. The system works well. It's easy to transport, too.

It was a very affordable way to get into UW photography. Brand new, the camera cost a little over $100 and the housing sold for $160 (although I paid much less for mine when the Canon Outlet was having a fire sale). For a backup, I purchased a used A570IS on Ebay for $50.

 

[flareside]

What underwater cameras do most divers use? As Bubbletrubble alluded to, whatever camera they can afford.

If you are on a really low budget, Ebay is the place to start looking. You can pick up a fairly decent three to four year old P&S with a housing for around $125 and two year old systems for less than $300. You will probably find Canon cameras easiest to pair up with a housing and they take reasonably decent pictures. Just look for one with a 28mm lens for best results.

 

[bvanant]

If you look just here you will see the following
Canon 24K Posts
Olympus 17K Posts
Nikon 8K Posts
SeaLife 4K Posts
Panasonic 900 Posts
Sea&Sea 500 Posts
Sony 400 Posts

Canon and Olympus are way ahead. Look here, on Wetpixel and Ebay for used gear that might be in your price range.
Bill

 

[knowone]

Cheap, second hand, rechargable, over 4 megapixels rated to 45 metres
because they go much further, that fits in a pocket with the programme
that comes with it to fix the pics and use it until I break it like the last one.