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Sigma Digital SLR Camera SD14 User Manual

Sigma Digital SLR Camera SD14
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83
HISTOGRAM
The histogram is a graph depicting the distribution of brightness values in the
image for each of the three color channels (Red, Green, and Blue). The
horizontal axis shows the brightness level, with darker pixels towards the left side
and brighter pixels toward the right. The vertical axis shows the proportion of
pixels at each level of brightness.
By examining the histogram of the full image, you can gauge the over-all
exposure of that image. You can also use the histogram to determine if
zoomed-in sections of an image are over or under exposed.
This histogram shows that the higher pixel
values are never used in the image, indicating
that the image is underexposed, and therefore
will appear dark. In general, when the
histogram is higher on the left side, the image
is mostly composed of dark pixels, causing it to
appear dark—either because the image is
underexposed or because it is a dark scene
such as night shot or sunset.
This histogram shows a fairly even distribution
of pixel values, indicating that the image is well
exposed, with good contrast. However, the
histogram distribution of a well exposed image
will vary greatly depending on the subject.
This histogram shows that many of the pixel
values are at their brightness limit, indicating
that some areas of the image may be blown
out. In general, when the histogram runs off the
right side, the image will have many white
pixels—either because the image is
overexposed or because it is a bright scene
such as the beach or snow.

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Sigma Digital SLR Camera SD14 Specifications

General IconGeneral
Camera TypeInterchangeable Lens SLR Type Digital Camera
Image Sensor Size13.8 x 20.7mm
Lenses UsedSigma SA Mount Lenses
Picture AngleEquivalent to 1.7x the focal length of a lens when used on a 35mm SLR camera.
Lens MountSA mount
Imaging Element TypeFOVEON® X3™ (CMOS)
Color Photo Detectors14.06 Million (2652 Columns x 1768 Rows x 3 Layers)
Image Recording FormatLossless compression RAW Data (12bit), JEPG
White Balance8 Type (Auto, Sunlight, Shade, Overcast, Incandescent, Fluorescent, Flash, Custom white balance)
Viewfinder TypePentaprism SLR Viewfinder
Viewfinder Frame Coverage98% horizontal, 98% vertical
Viewfinder Magnification0.9x (50mm F1.4 at infinity)
Eyepoint18mm
Diopter Adjustment Range-3dpt to +1.5dpt
Auto Focus TypeTTL phase difference detection system
AF Operating RangeEV 0 to 18(ISO100)
Focus ModeSingle AF, Continuous AF (AF Predict function), MF
Metering Systems8-segment Evaluative Metering, Center Metering, Center-Weighted Average Metering
Metering RangeEV 1 to 20(with 50mm F1.4 at ISO100)
Exposure Modes(P) Program AE、(A) Aperture Priority AE、 (S) Shutter Speed Priority AE、(M) Manual
ISO SensivityISO 100, 200, 400, 800, (1600)
Exposure Compensation±3EV(in 1/3steps)
AE LockPush button type
Auto Bracketing±3EV ( in 1/3steps, Appropriate Exposure – Under Exposure – Over Exposure)
Shutter TypeVertical-travel metal focal plane shutter, electronically controlled through entire speed range
Shutter Speeds1/4000sec to 30sec, Bulb up to 30sec Flash Synchronization at 1/180sec.
Storage MediaCompactFlash™ (CF) (TypeⅠ/Ⅱ), HITACHI MicroDrive™
Aspect Ratio3:2
ResolutionSuper Hi(JPEG) : 4608 x 3072, HI:2640 x 1760 MED:1776 x 1184, LOW:1296 x 864
InterfacesUSB 2.0, Video Out (NTSC/PAL)

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