I want to start learning underwater photography. What do you need for underwater photography?

The most important thing in underwater photography is to prevent the camera from getting into the water. ? Can I use Canon 5D2 when I do business underwater and have sufficient funds? Canon7D？ Cameras such as Canon 1DX. If the funds are limited, you can buy a waterproof suit for underwater creation. The equipment is ready, and the rest is the skill. The skill recommends the following methods.

Prepare waterproof flashlight, which is mainly used to fill light in deep water. Diving doesn't have to be considered

Increase shutter speed to avoid underexposure.

Improved lighting supplement for IOS. Diving can pursue image quality.

Wide-angle and fixed-focus lenses should be prepared on the lens.