Sigma DP1X Manuel d'utilisateur télécharger pdf (Page 112)

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EXPLANATION OF TERMS

Auto Exposure; by using a built-in exposure meter, the camera determines the

correct exposure value, which is a combination of shutter speed and aperture

value.

AE Lock

The camera will fix and memorize the exposure value with AE lock. For example,

if a photographic subject is placed in the center and exposure value of the

composition is fixed, the brightness of the background will not influence the

exposure, even if the composition changes and the subject is moved from the

center of a screen. (AE lock button must be used).

Auto Focus; by using a built-in sensor, camera adjusts the focusing automatically.

AF Lock

In AF shooting mode, you can lock the focus on the main subject. For instance,

compose the desired subject in the center of the viewfinder. With the focus fixed

at the same setting, you can re-compose the picture with the subject off-center

and take pictures. (Please press the shutter button “Half-way” to use this feature

with the Sigma DP1X).

Aperture

The lens opening of the iris diaphragm inside the lens. The amount of light, which

strikes the image sensor, is adjusted by the iris diaphragm. The f-number (Focal

Length/Diameter of the Aperture Opening) describes the size of this opening, the

size of the hole can be made larger or smaller. A large aperture (low f-number)

gives bright results and a small aperture (high f-number) gives darker results.

Auto Power-Off

To save battery power, the DP1X camera will automatically turn itself off if it is not

used for a period of time.

CMOS

Complementary Metal Oxide Semiconductor (CMOS) can perform signal

amplication on a per-pixel basis. Significant current flows only during the

switching operation. Therefore a CMOS image sensor can scan data rapidly,

sustain high-speed operation and consume less energy. Recent technological

and production improvements in digital imaging systems are making CMOS more

and more competitive in terms of image quality and cost.

Color Temperature

The numerical expression of the tone of the light, produced by a light source. The

standard unit for color temperature is degrees Kelvin (K). The sunny daylight

used as a standard near 5600 K. Low color temperature implies warmer more

yellow/red light while high color temperature implies a colder more blue light. The

typical color temperature of Tungsten light is 3200 K grade, a personal computer

is 9300 K.

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Sigma DP1X Manuel d'utilisateur Page 112