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EXPLANATION OF TERMS
AE
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).
AF
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 DP3 Merrill).
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 DP3 Merrill 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.
