Canon F1-N Brochure & Specs page 39

will not be displayed. In this case, first turn the shutter dial to "2000," then back
to "A."
Notes:
Exposure information will not be displayed with a different finder attached
and the shutter dial set on "A."
With a New FD lens "without chrome mount ring), the aperture is displayed
adjacent to the shutter speed scale in the viewfinder. It is impossible, however,
to read the aperture when using an FD lens with a chrome mount ring or when
using an extender, extension tubes or other close-up accessories between the
camera body and lens.
18 APERTURE-PRIORITY AE
34