Canon QL FT - Page 14

Index
Pre-Set
Aperture Ring
--:;r- -- A'M Ring
Pre-Setting Aperture and Checking
Depth-of-Field
Lens with A·M Ring
1
Pre-Setting of Aperture: Set the A-M ring at
" A" _ Then set the desired f/stop on the
pre- set aperture ring to the index_ The dia-
phragm will close down to the pre-set f/ stop
only for the instant that the shutter is released_
2
Manually Operated Aperture: When the A-M
ring is set at "M" the diaphragm closes down
to any desired f/ stop by turning the pre-set
aperture ring and the depth-of-field at the time
of shutter release can be checked. When the
A-M ring is reset at "A" the diaphragm again
returns to maximum opening.
14
Index
Pre-Set
Aperture Ring
Manual
Aperture Ring
Lens with Manual Aperture Ring
1
Pre- Setting of Aperture: Set the desired
f/
stop on the pre-set aperture ring to the
index. Then set the index of the manual aper-
ture ring to this pre-set f/ stop. The diaphragm
will close down to the pre-set f/stop only for
the instant that the shutter is released.
2
Manually Operated Aperture : When the
manual aperture ring is turned in the direc -
tion of closing down the diaphragm, after set -
ting the desired f/ stop on the pre-set aperture
ring to the index, the diaphragm will close down
to the pre-set f/stop and the depth-of-field can
be checked .
The manual aperture ring can-
not be turned when set at maximum f/ stop.
• Refer to pages 34-35 concerning depth - of -
field_