Shutter And Aperture Adjustment - Canon FT QL Instructions Manual

Make rever se turn
w h en it stops at "X ".
Make rever se turn
when it stops at "B ".
The d ia l ca nn ot be turned
between "B" and ·· X ".
Shutter and Aperture Adjustment
The shutt er and ap erture ad just the exposure ,
with the shutter ad justing the exposure time
and the aperture adjustin g the amount of lig ht.
The Canon FT QL uses the zero-method coupled
meter , and it is very simple to get the proper
exposure.
Shutter Speed Dial
By revolvi ng the d ial , it is possible to adjust
the speed by turning it to the necessary index
number . The index on the dial s hows the
denominators 1/ 1000 sec., 1/ 15 sec ., etc .
,. The shutter speed dial does not revolve be ·
tween the inde xes "X " and " B ''.
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•
• Set the i ndex at the position where the click
stop catches .
• "B" means bulb exposure. The shutter,
which remains open during the pressing of the
shutter release button, is employed when mak·
i ng exposures of more than one second.
In case of" B" index, adjust it to the white dot
just below the "B" index.
,. When it is necessary to make an exposure
over an extended ti me , first set it at " B " . Keep
the shutter release button pressed , turn the
time lock lever to " L". In this case , even if
the finger is removed, the exposure continues.
When the lever is returned to " A" , the shutter
closes .
,. Time ex posure is possible also by using the
lock-attached cable release .
• The "X" index is used for synchronizing a
speedlight. Although the shutter speed is 1/60
sec., actually it is equivalent to a very short
exposure during the flash time of the speed light .
Lens Ape rt ure
The adjustment of the quantity of light and
depth -of -field are made by turning the pre -set
aperture ring to adjust the desired f / stop to
the index .
• As the numerical value of the f/ stop gets
larger, the amount of light reaching the film
becomes correspondingly less . For each f / stop
the light is reduced one -half . Accordingly , when
Pre-set
Apertur
Ring
the aperture is increased by one index point , the
exposure is doubled , and when it is increased
by two index points the exposure is quadrupled .
.. The aperture ring can also be set to inter-
mediate values.
• Depending on the lens , there are instances
where there is no r el at ion to the lightness be -
ing halved betw ee n the ma ximum diameter of
the aperture and the ne xt aperture reading .
• The ratio between the aperture and the
amount of exposure, using f / 2 as the ba sis,
is as follows :
Lens Aperture
l.2 l.4 l.8 2 2.8 3.5 4 5 .6 8 11 16 22
Exposu re Ratio
3
2 l.25
1
1/2
1/3 1/4 1/8 1/16 1/32 1/64 1/128
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