Bedienungsanleitung Fujifilm finepix s1 pro (Seite 37 von 132) (Englisch)

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Background: A Brief Guide Focusing and Exposure

Focusing, exposure and exposure metering are key factors in taking

photographs. By understanding these aspects of photography, you can

achieve a wider range of photographic effects.

■ Focus and Depth of Field

When you focus the camera on a point, an area in front of and behind that

point is also in focus. This area is referred to as the depth of field and varies

depending on factors such as the distance to the subject, the focal length of

the lens and the aperture setting. In particular, narrowing the lens aperture

(selecting a higher f-stop) increases the distance over which objects are in

focus, giving what is referred to as a large depth of field. Conversely, widening

the lens aperture (selecting a lower f-stop) decreases the distance over which

objects are in focus, giving a shallow depth of field (☞ P.67).

■ Exposure

Exposure refers to the process by which light from the subject (the person or

object being photographed) passes through the camera lens, hits the film

(CCD) and is recorded. During this process, it is important that the sensitivity

of the CCD in the camera is matched to the brightness of the subject and that

the shutter speed and aperture are adjusted so that the correct amount of light

reaches the CCD (correct exposure).

To ensure optimum exposure, the FinePix S1 Pro is provided with a number of

exposure modes. These include the AUTO, programmed auto and image

program modes, in which the camera sets both the focus and the aperture

setting, the shutter-priority auto mode, in which the photographer sets the

shutter speed and the camera sets the exposure, the aperture-priority auto

mode, in which the photographer sets the exposure and the camera sets the

shutter speed, and manual mode, in which the photographer sets both the

shutter speed and the aperture setting by referring to the camera’s exposure

meter (☞ P.64).

■ Exposure Metering

The action of measuring the brightness of the subject (the person or object

being photographed) is referred to as exposure metering. Exposure metering

is an important source of information for determining the exposure. This

information is used to determine the combination of shutter speed and

aperture settings that will allow the optimum amount of light to hit the CCD.

Because the distribution of light in the image that includes the subject is not

necessarily uniform, the FinePix S1 Pro divides the image into 6 sections and

provides 2 types of exposure metering. These are “multi-pattern metering”, in

which the optimum exposure is determined using independently measured

light information for each section, and “center-weighted metering”, in which the

exposure metering information for the central part of the image is emphasized

in determining the optimum exposure.

If a D-type AF Nikkor lens is mounted on the camera, and additional metering

mode called “3D 6-zone multi-pattern metering” is available in which distance

information is also considered (☞ P.69).

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