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We all hope we will never get trapped in a never-ending underwater cave system like the team of divers in the 2011 blockbuster movie Sanctum – but if you did, how much would you give to have an underwater camera with you to show your friends when (if?) you return to dry land just what amazing sights you saw down there in the depths …

The SeaLife DC1200 Underwater Digital Camera will allow you to take great pictures and videos underwater down to 55 metres and on land as well.

The Sea&Sea DX-GE5 Compact Camera Set is a worthy alternative at a similar price to the SeaLife DC1200 Underwater Digital Camera.

The DX-GE5 comprises a convenient and very impressive full-featured waterproof digital stills and video camera kit boasting 12.2 effective megapixels and 4x optical zoom with the included camera housing matching the DC1200 housing’s depth capability of 55 metres.

But when you need flash to illuminate further below the surface, the SeaLife DC1200 Elite Underwater Digital Flash Camera is one camera that will let you achieve so much more.

The SeaLife DC1200 Elite achieves the balance of offering a great deal of control over the technicalities of taking underwater pictures and videos but yet making underwater photography easier than ever before.

Mystical sea creatures, vibrant colourful reefs or haunting wrecks from a bygone era, the DC1200 is the camera to catch them all.

SeaLife’s 12-megapixel camera combines a diver-friendly design and four underwater colour modes, for sharp, colourful pictures beneath the waves or on land.

With the DC1200 Elite, SeaLife have eliminated the typical button cluster on the back of the camera in favour of five thumb-operated piano key controls.

The large shutter button extends forward with a fingertip-control lever that allows you to scroll through menus or zoom in and out without releasing your grip from the camera.

The Central Command Lever and the Piano Keys make great underwater photos and videos easier than ever before. And should you consider yourself an expert and put your art before the dread of the inner sanctum of a deep and dark submerged cave, you could consider also the SeaLife DC1200 Maxx Underwater Digital Camera to meet your needs with its two Digital Pro Flashes to produce the brightest images and to eliminate shadows.

Professionals are also catered for with the Videoray series costing from around £2000 up to nearer £50,000 for a unit that can be manually or remotely computer controlled and that is equipped with its own propulsion system.

Amazingly, at the other end of the price scale, underwater stills flash photography is available for around £20 with the Snap Sights! Sports Utility Flash Camera SS01, which the makers say can be used anywhere, any time - day time, night time, on land, under water, indoors or out.

It is waterproof down to 30 metres and so opens up a whole new world of sub-aqua photography at a very low price. The Snap Sights! Sports Utility Flash Camera SS01 is perfect for so many activities, including diving, kayaking, fishing, camping, hiking and much more.

However, the range of uses for the new generation of action sports cameras is probably even broader.

The GoPro series of digital cameras are the world’s best-selling wearable high-definition cameras for sports and are ideal for watersports such as surfing, sailing, windsurfing and kitesurfing.

GoPro HERO cameras can be worn on the wrist, chest or helmet and mounted on surfboards for the best action pictures and videos imaginable.

GoPro HD Surf HERO is the world’s only 1080p HD on-board video and stills photo surfing camera and will record professional-quality 1080p/960p/720p HD resolutions at 30 frames per second (60 fps in 720p).

The HD Surf HERO is easily mounted on any surfboard in seconds and it’s so light, even top pros claim they don’t even notice the camera on their boards.

The HD Surf HERO Camera can also shoot 5MP photos automatically every 2 seconds while you surf.

The batteries last for over 2.5 hours of HD video or automatic photo taking on a 32GB SD card, so you can document your entire surf with a single push of the shutter button on the paddle out.

The adhesive base can be mounted in seconds and it is proven in heavy surf from Hawaii to Tahiti, Southern Mexico to Northern California. Or you can install an FCS fin plug into the deck of your board and then use GoPro’s patent-pending camera mounting plug to allen key your HD Surf HERO into the FCS plug.

Optional accessories make it easy to mount the camera on your wrist, bike, scooter, jet ski or helmet. And if you’re tow surfing, a chest harness is available for that too.

The HD Surf HERO Camera is waterproof to 180 feet (60 m) and protected from rocks and other hazards thanks to its removable polycarbonate housing.

Replacement housings and lens kits are available, making repairs or refurbishing your HD HERO camera affordable and convenient.