Match-Needle Metering; Stopped-Down (Fixed-Index) Metering - Canon F1-N Brochure & Specs

18.2 Match-needle Metering

18.2 Match-needle Metering
To meter the subject manually, simply disengage the shutter dial from "A." The
shutter speed scale will disappear, and the aperture scale and shutter speed display
will appear to the right of the field of view. Then set the shutter speed and aperture
in the usual manner, matching the meter and aperture needles in the viewfinder.
18.3

Stopped-down (Fixed-index) Metering

Although stopped-down AE is a much simpler and faster method of metering, you
can still use fixed-index stopped-down metering.
incorrect exposure
36
18 APERTURE-PRIORITY AE
correct exposure