"When the AE Power Winder FN or AE Motor Drive FN is attached to the New Canon F-1, a choice of shutter-priority AE or manual exposure is available according to the shooting situation and your personal preference."

-So to get shutter priority metering you have to have have a external winder attached??
Wtf is the AE Finder for then if the camera allready has aperture priority but requires the winder for Tv?