Sigma SD15 User Manual

48
EXPOSURE MODE AND BUILT-IN FLASH
P mode
Depending on the brightness of the subject and focal length of lens, the most
appropriate shutter speed (between 1/30 - 1/180 sec) and aperture will be
selected.
In bright situations, the flash will be “daylight synchronization flash”, and the
camera will calculate the appropriate flash amount for the correct exposure, of
both the subject and background. If the ambient light is too great, resulting in
overexposure, the shutter speed and aperture value displays will blink. If the
subject is too dark, the camera will proceed to take a flash exposure with the
aperture fully open.
A mode
Use this mode if you want to set the desired aperture value. The camera will
select the appropriate shutter speed for the background. The shutter speed will
operate at 1/180 or slower. In bright situation, the camera will work the same as P
mode for daylight synchronization flash and it can obtain a balanced exposure
between the subject and background. If the maximum synchronized shutter
speed is displayed and is blinking, please set the aperture value to a smaller
aperture value (large F-number).
S mode
Use this mode if you want to set a specific shutter speed. The camera will select
the appropriate aperture value for the background. The shutter speed will operate
between 1/180 or slower. The camera will automatically correct the shutter speed
to the highest synchronization speed even if you select a higher shutter speed. If
the subject is too bright, the flash will be set to daylight synchronized. Then you
can obtain a balanced exposure between subject and background. When the
lens smallest aperture (largest F-number) value is blinking, the picture will be
over-exposed.
M mode
This mode enables you to set both flash synchronized speed and aperture value.
If you set a synchronized speed faster than 1/180, the shutter speed will be set
automatically to 1/180. If the exposure meter indicates appropriate number, you
will obtain the correct exposure for the subject and background. If the exposure
meter indicates minus (under), you will obtain the correct exposure for subject,
but the background will be dark. If the exposure meter indicates plus (over), both
the subject and the background may be over-exposed.
CAUTION !!
• When P and A modes are showing the shutter speed as 1/200sec., the
actual shutter speed value is 1/180sec. In the case of S and M modes,
please select 1/200sec., if you wish to set the shutter speed to 1/180sec.

Sigma SD15 Specifications

General

Camera Type	Interchangeable Lens SLR Type Digital Camera
Image Sensor Size	13.8 x 20.7mm
Lenses Used	Sigma SA Mount Lenses
Picture Angle	Equivalent to 1.7x the focal length of a lens when used on a 35mm SLR camera.
Lens Mount	SA mount
Imaging Element Type	FOVEON® X3™ (CMOS)
Color Photo Detectors	14.06 Million (2652 Columns x 1768 Rows x 3 Layers)
Image Recording Format	Lossless compression RAW Data (12bit), JEPG
White Balance	8 Type (Auto, Sunlight, Shade, Overcast, Incandescent, Fluorescent, Flash, Custom white balance)
Viewfinder Type	Pentaprism SLR Viewfinder
Viewfinder Frame Coverage	98％ horizontal, 98％ vertical
Viewfinder Magnification	0.9x (50mm F1.4 at infinity)
Eyepoint	18mm
Diopter Adjustment Range	-3dpt to +1.5dpt
Auto Focus Type	TTL phase difference detection system
AF Operating Range	EV 0 to 18 (ISO100)
Focus Mode	Single AF, Continuous AF (AF Predict function), MF
Metering Systems	Evaluative Metering, Center-Weighted Average Metering, Center Area Metering, Spot metering
Metering Range	EV 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 Sensivity	ISO (50), 100, 200, 400, 800, 1600, (3200) *( )Extended Mode
Exposure Compensation	±3EV (in 1/3steps)
AE Lock	Push button type
Auto Bracketing	Three or five frames (in 1/3steps, Appropriate Exposure – Under Exposure – Over Exposure)
Shutter Type	Vertical-travel metal focal plane shutter, electronically controlled through entire speed range
Storage Media	SD Card / Compatible with SDHC, Multi Media Card
Aspect Ratio	3：2
Resolution	HI：2640 x 1760 MED：1872 x 1248, LOW：1312 x 880
Interfaces	USB 2.0, Video Out (NTSC／PAL)