> hi,
> can anyone tell where the nodal point for the
> coolpix 990 is

Here's a couple of links that should help.

The first one gives you physical measurements to the
nodal point etc.

http://www.360texas.com/tips/15.htm

While the second shows you how to make your own tripod
bracket to mount your coolpix 990 correctly over the 
nodal point (Thanks Philo for this).

http://philohome.free.fr/lbracket/lbracket.htm

Bob B.

Michel Thoby devised a fairly interensting technique to determine nodal 
point: 

http://michel.thoby.free.fr/
 
Cheers,
 
Philo