I am from Holland and started making UW pictures in the early 70ties, using a self-built perspex housing with a Pentax camera inside, and a perspex housed flash. Then I bought the fabulous Rolleimarin with the Rolleiflex 3.5. f, which became my good companion for many years. This camera was ideal for close-up shots, in particular fish portraits. I then switched to a Hugy systeem (Hugymarin) with a Mamya 645 that allowed me to use wide-angle Secor lenses. Finally I ended up with the digital stuff: NikonD80/D90/D7000 in Ikelite housings, using mostly the Tokina wide angle 10-17 and 12-24 lenses. A great advantage of the digital camera's was that one could shoot hundreds of pictures during a single dive, while with an analog camera in the 6X6 format this was only 24 shots. With a succes ratio of 1:10 for UW pictures, this of course meant many more nice pictures during a diving trip.
Favourite diving spots: the 'Isles d'Or' in the French Mediterranean, the Red Sea, Borneo, and (more recently) the Bahama's.