[net.rec.scuba] Nikonos question

cdj@mh3bs.UUCP (09/16/83)

On a recent scuba trip, I was loaned a Nikonos camera.  Can anyone tell
me whether the distance markings on the lens focus adjustment are for
above surface or underwater measured camera-to-subject distance?
(The owner didn't know and there was no manual.)

			Cris Johnson
			3C412B Bell Labs
			Murray Hill, NJ

stevek@umcp-cs.UUCP (09/17/83)

	Unless I am misreading it the NIKONOS lenses are marked for
measured underwater distances. For example setting the lens at 4ft
is the same as 3 apparent feet underwater.
	It makes little difference since you will almost always use
a strobe and rely on the depth of field to be sure the subject is in
this depth of field range.
	My reference is "The Nikonos Book" by Jim and Cathy Church.
	Stephen Kogge
	Dept. of Comp. Sci.
	Univ. of Md.