HMI technology is not new. It evolved in the late 1960s when lamp developer Osram began producing HMI bulbs for the film industry at the request of German television seeking a less expensive alternative to incandescent lights. Ironically, HMI is now much more expensive than halogen and tungsten.
With several reputable brands producing entry-level digital SLRs (DSLRs) at a very competitive price, a number of underwater photographers currently using consumer or prosumer cameras are now thinking of upgrading their current set-up. But stop! Before you make the big leap, just read these few words of hard-earned wisdom.
Blue Lagoon, Castaway, Savage Islands, Anacondas ... names that evoke impressions of aquamarine water, waving coconut palms, white sand beaches, secret gardens, hidden lakes, swift rivers, waterfalls, high mountains and raw adventure.
If looks could kill, the whale shark would be the most deadly creature in the sea. Up to 14 metres in length, weighing as much as 20 tonnes, and sporting hundreds of teeth, it is outclassed in size only by the true whales.
The tropical seas from the shores of East Africa, the Red Sea, through to South East Asia and then eastward to Australia, the Solomons and extending to the islands of Hawaiian Islands is the worlds richest marine province.
Drawing a deep breath, I dive into a primordial sea. My vision opens to a sea of jellies swimming gracefully in a green aquaria, visibility remaining clear at 5m as long as I am careful not to touch bottom and stir up the silt accumulated over the last 19,000 years.