Canon – Canon Model 7 User Manual
Page 15
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Canon
f
SETTING THE LENS APERTURE . ..
The lens aperture adjusts the light volume
that reaches the film and also the depth
of-field (see page 30).
The
required
"F”
stop
can
be
obtained
by
turning
the
lens
aperture
ring
until
the figures align with the index mark.
The
following
table
shows
the
relation
between aperture value and exposure time
QÍ
\
Lens
Aperture
Ring
Lens aperture
0.95
1.2
1.4
1.8
2
3.5
4
5.6
S
11
16
22
Relative
exposure time
t/4
1/3
1/2
1/1.25
1
3
4
8
16
32
64
128
12 The figures on the lens aperture ring can be set between two figures.
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