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	Introduction
	The Nikonos discovery
	The first lesson
	The second lesson
	The third lesson
	The command dials
	The lenses
	More lenses
»	DOF
	The exposure metering system
	Cancun
	More of Cancun
	Nikon School
	Still more of Cancun

The depth of field issue is none really with the Nikkor underwater wide angles. Somehow I have never had an out of focus picture. Simply try to shoot at no less than f/5.6, find a film with an ISO speed sufficient for that in the waters you venture in. In the Caribbean, at noon, sometimes ISO 100 is enough, 200 better.
 

Clown fish taking refuge in an anemone in Belize Nikonos V with close-up frame kit

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In this picture you can appreciate all of the fish at various distances in focus, although ISO speed was low and aperture wide, no flash.
This other picture at lower depth had its DOF improved by a smaller f-stop, due to higher ISO film speed and TTL flash from the SB-103 speedlight