In article <1281395081-960402063941@rook.wa.com>, phil.chang@rook.wa.com says...

>I believe the F2AS does meter in stop down mode but the F2A does not.
>Somebody correct me if I'm wrong.

You're wrong...;-)
There is a little catch by the AI tab that allows locking the tab up
out of the way of non-AI lenses.
Hope This Helps