Canon F1-N Brochure & Specs page 51

22 EXPOSURE COMPENSATION
1. Manual Exposure
After setting the desired shutter speed, turn the aperture ring until the aperture
needle aligns with the meter needle. You can now over- or underexpose the subject in
one-half f/stop increments simply by turning the aperture ring to a larger or smaller
aperture. Note that the diameter of the aperture needle's circle is equivalent to one
f/stop. This method of exposure correction is useful, for example, when shooting a
subject with strong backlight.
46