Canon A-1 User Manual
Page 95
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The next two digits following the first four
frora the left for shutter speed data are
reserved for aperture data. The possible
apertures to be displayed in the digital
readout
range
from
f/1.2
to
f/32
even
though the minimum aperture it is possible
to set on the AT dial is only f/22. The
aperture data in the digital readout is dis
played in 1/2 f/stop increments, giving nu
merical values standing for the dots on the
aperture scale of the AT dial. An indicated
aperture of 9.5, for instance, in the view
finder stands for the dot between f/8 and
f/1 I on the AT dial aperture scale. These
half f/stops are approximations which are
not always exactly halfway between the full
f/stops.
f/9.5-
9
. 5
Although both shutter speed and aperture
are indicated in the viewfinder in each 1/2
step increment, they are actually controlled
by the camera steplessly for greatest possible
precision.
There are other possible displays, including
M, buLb, F, bu F, and a flashing EEEE EE.
“M” is the last digit on the right in the
digital readout. It appears when the camera
is not set for AE control. “F” or “bu F”
supplements or replaces the shutter speed
data in the digital readout when the camera
4
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