Photography – Canon QL19 User Manual
Page 30
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PHOTOGRAPHY!
ture stop and the amount of exposure, with
F2 as the basis is as follows :
Aperture stop:
1.7 2 2.8 4 5 6 8 11 16
Exposure ratio: '/
1 . 3 8 1 2 4 8 16 32 64
Effectiveness of the aperture
*
As the numerical value increases, quantity
of light becomes lesser. For each indexed
point, the light is reduced one-half.
*
The bigger the numerical value, the deep
er the scope of the focusing.
“
The
farther
the
distance
of
the
subject,
the deeper is the scope of focusing.
*
On the other hand, the greater the lens
opening, the shallower the focus.
The
shutter
speed
adjusts
the
exposure
time
Similar
to
the
lens
aperture
scale,
each
index
of
the
shutter
speed
means
double or one-half of the exposure time.
So, if you turn the shutter speed ring one
stop faster, open the lens aperture one stop
Effectiveness of shutter spee9
High
speed; For preventing blurs, taking
a fast moving object, and for effective
ness of use of aperture.
Low speed;
For taking dark subjects,
using blurs for effects, and for effectiveness
of use of deep aperture
19