In article <31B270D9.4F78@unix.nets.com>, calebr@unix.nets.com says...

>I have a friend with a Nikon N2020 camera.
>He loves it, but he bought it used, no manual.
>We can't figure out what the dial control labeled
> "[P]Dual" means, if anyone knows, please e-mail me.

"P Dual" refers to the alternate programs which are
selected by the focal-lengths of AIS-type lenses. In
practice, the normal program mode (which generally
selects too-high-a-shutter-speed/too-wide-an-aperture
pairs) selects an even worse speed/aperture pairing
with lenses longer than about 105mm (?).
Hope This Helps