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Index to the essential course in UW photography. Introduction: why be serious about your hobby? Film & lens: slide, neg or digital? what lenses? Water&light: you are in a dense medium that spoils. Mixed light: your key to success, but hard to do. Macro: easily done but most disappointing. Opportunities: secrets to success, from experience. (Nikonos) cameras: what to demand of a good tool. Movie&video: looks easy, but is most difficult. Digital darkroom: revolutionary new techniques. Unsharp: solving unsharpness problems. Seafriends photo library: many photos, scattered. Images: a collection of interesting images. Seafriends CD: over 2000 images 800x600 pix.