Olympus iS-20 IS-20 DLX Instruction Manual (2 MB) - Page 49

Exposure - is 200 camera

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EXPOSURE 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. IS0100 or.lSO-200). The automatic exposure function automatically sets the correct exposure. This camera employs two types of automatic exposure modes: programmed autoexposure and aperture-preferred autoexposure. 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. Aperturepreferred auto gives more artistic freedom of expression and creativity by selecting a desired F stop to control the blur of the background. Program Chart (FULL AUTO) The following program chart is for 28mm wide-angle and 110mm 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 remains wideopen and only the shutter speed changes to as slow as 2 sec. to match the available light (ISO 100). In the standard shooting mode (refer to p.40), if the built-in flash has been flipped up, it will automatically fire in dark lighting or backlit conditions. The shutter speed will be fixed at 1/100-sec. 49

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EXPOSURE
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. IS0100
or.lSO-200).
The automatic exposure function
automatically sets the correct exposure. This
camera employs two types of automatic
exposure modes: programmed auto-
exposure and aperture-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.
Program Chart (FULL AUTO)
The following program chart is for 28mm
wide-angle and 110mm 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 remains wide-
open and only the shutter speed changes to
as slow as 2 sec. to match the available light
(ISO
100).
In the standard shooting mode (refer to
p.40), if the built-in flash has been flipped up,
it will automatically fire in dark lighting or
backlit conditions. The shutter speed will be
fixed at 1/100-sec.
49