In article <4gdark$fq9@mckinley.cit.macalstr.edu>, weinstein@macalstr.edu says...

>Was shooting some still lifes last night with my f3hp and wanted to >shoot using mirror lock-up and the A mode. Wouldn't work!!! My
>question is, Is it supposed to? Is the damn thing supposed to be
>clever enough to know that its aperture is closed when it meters?
>Is it my use of an extension cable? HELP!!!
>PS Mirror lockup works A-OK when I set the speed manually.

The F3 meter requires the mirror to be down in order to read
(and if an AI lens is attached and engaging the body AI tab,
the lens aperture needs to be in its normal wide-open mode),
so "A" mode will not work with the mirror locked up.
Hope This Helps