underwater Photo Course :: (1) The Basics :: Optic Basics
U/W Photo Course
Learn u/w photography the easy way!
Underwater photography suits subjects at the extremes both large and close,
or small and close. For large, close subjects we use a wide angle lensA wide angle lens is one that has an angle of view significantly wider than a normal human perspective. Typically less than 28mm (on the 35mm system).
and for small, close subjects we use a macro lensAn extreme closeup lens..
We will look at lenses (and equipment generally) in the next chapter. For now,
let's just quickly consider one very important aspect of every picture - focus.
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