Automatic Exposure Mode
Exposure refers to the amount of light which strikes
the film, and is controlled by a combination of
aperture size and shutter speed. The correct
amount of light, called correct exposure, depends
on the film speed (indicated on the film package,
e.g.
ISO 100 or ISO
200).
The automatic exposure function automatically sets
the correct exposure. The IS-3000 employs three
types of automatic exposure modes: (1)
programmed auto-exposure, (2) aperture-preferred
auto-exposure, and (3) shutter-preferred auto-
exposure.
With programmed auto exposure, the camera
automatically selects the most suitable combination
of F stop and shutter speed for the existing lighting
conditions. This lets you concentrate on composing
your shot and releasing the shutter at just the right
time.
With aperture-preferred auto, you select the desired
F stop, and the camera automatically selects the
correct shutter speed. Aperture-preferred auto
gives more artistic freedom of expression and
creativity by selecting a desired F stop to control
the blur of the background.
With shutter-preferred auto, you select the shutter
speed, and the camera automatically selects the F
stop. By changing the shutter speed, you can
freeze a fast-moving subject or blur it to convey a
sense of motion.
Program Chart (Standard Photography Mode)
The following program chart is for 35mm wide-
angle and 180mm telephoto focal lengths.
According to the focal length, the camera's program
itself changes. When the subject is brightly lit, the F
stop and shutter speed change simultaneously.
When the lighting is darker, the aperture opens fully
and the shutter speed changes to match it.
In the standard photography mode (refer to p. 14), if
the built-in flash has been flipped up, it will
automatically fire in dark lighting conditions. The
shutter speed will be fixed at 1/100-sec.
EXPOSURE
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