Shutter Speed Scale On The At Dial - Canon A-1 Instructions Manual

Shutter Speed Scale on the AT Dial
There is a choice of J 6 click-slop settings
ranging from l / l
000 (sec.) to 30 (sec.) on
Lhe AT dial's shutter speed scale. The slow
shutter speeds from 2 (sec.) Lo 30 (sec.) are
marked in orange while shuLLer speeds from
1
(sec.)
LO 1/1000
(sec.) are
in white. The
white numbers on the scale arc the reci-
procals of Lhe Lrue shutter speeds so that a
white 2 indicates a speed or 1/2 sec. while a
white 1000 indicaLes a speed of
1 / 1
000 sec.
Be careful n ot to confuse 1.he slower orange
range with the faster whiLC range.
Above t he highest speed of
1/1000 is
the
"P" for programmed t\E, l3clow the lo west
speed of 30 is t h e "JV' setting. The d ial will
not turn past t he "P" or the "B".
The "B" (Bulb) setting is in tended for
exposures longer than 30 sec. When the
shutter speed is set at "13", the shutter will
remain open as long as you press the shutter
-36-
button. AE photography is no t possible at
the "B" setting. The a perture must be set
manually. Remember that it is very im-
portant lo use a tripod and a cable release,
preferably with a lock, in long exposures to
reduce the chance of image blur. Also, since
long exposures present a real drain on the
battery, it may be wise to carry a spare.
The A-1 has
a hot shoe and PC outlet for an
X-synch (flash synchronization) at
1/60
sec.
(th e~
position). This sh utter speed need not
be considered, however, when the A-1 is
used with specified Canon flash units (see
page 83).
In term ediate settings on the shutter speed
scal.e canno t be
usec~. H owe~er,
if
yo u
accident ally set an mtermed1ate shutter
speed, the camera ·will automatically select
the next lower or higher shu tter speed as t h e
effective shutter sp eed, and t hat shu tter
speed will b e displayed when yo u take an
exposure preview.
If
you mistakenly try a ti me ex p osurt: on
"bulb" while the lens is still at "A", ex-
posure will take place a t th e lens minimum
aperture.