|Digital SLRs: Sigma SD10||
Foveon X3(R) direct image sensor in the Sigma SD10 digital SLR can capture all RGB colors at each and every pixel. The revolutionary design of Foveon X3® direct image sensor features three layers of pixel sensors
Using three silicon-embedded layers of pixel sensors, stacked to take advantage of silicon’s ability to absorb red, green, and blue light at different respective depths, the Foveon X3® direct image sensor can thereby directly capture full color and detail at each and every pixel location, without interpolation.
Other conventional image sensors feature just single layer of pixel sensors in a tiled mosaic pattern. Each pixel detects only one color of light, which has been filtered through a single red or green or blue color filter. As a result, two thirds of the color information at each pixel is blocked out. To compensate, the missing color is estimated through a complicated process of color interpolation, leading to color errors, color artifacts and loss of image detail.
Sigma SD10, powered by Foveon X3® direct image sensor, however, captures all three colors at every pixel location, ensuring the capture of full, complete color. It efficiently reproduces color more accurately, and offers sharper resolution, pixel for pixel, than any conventional image sensor.
With the RAW data recording system of the SIGMA SD10, it is possible to obtain high picture definition and compact file size. The lossless compression system of RAW data, eliminates image deterioration, provides superior pictures, without sacrificing original image quality and retains full image capture details.
Depending on the intention of the photographer, the SIGMA SD10 allows photographers to capture RAW data images in one of three resolutions.
HI mode (2268 x 1512 x 3 layers) delivers highest resolution image performance. MED mode (1512 x 1008 x 3 layers) has high definition and recording capacity. LOW mode (1134 x 756 x 3 layers) for capturing the most images per given memory capacity.
The SD10 comes with SIGMA Photo Pro 2.0 software for modifying recorded RAW data image files. It is easy to make adjustments (white balance, exposure, color balance, and contrast for example) in three modes. The X3F mode stores the original settings of the image at point of capture. In the auto adjustment mode the software analyzes and automatically makes adjustments of RAW data. The custom-mode allows the photographer to make individual adjustments to exposure, contrast, shadow, highlight, sharpness, and saturation. The latest addition to Sigma Photo Pro 2.0 software is X3 Fill Light. This easy to use facility corrects tones on images of high contrast exposure or back lit pictures. The under exposed areas of the image can receive extra exposure without "burning out" the highlight regions. Conversely, more detail can be obtained from over-exposed sections without plunging the more shaded areas into darkness.
SIGMA Photo Pro supports 8-bit TIFF, 16-bit TIFF, and JPEG file formats and also outputs images in four-color space (s.a. sRGB and AppleRGB). The default setting for resolution is the same as the resolution selected when capturing the image on the camera (High, Medium, or Low). It is also possible to select one half, or double the resolution for the processed image.
In Default or normal mode the ISO sensitivity of SD10 can be set to 100, 200, 400 and 800. If Extended Mode is selected, it is possible to use ISO 1600 sensitivity. In any ISO sensitivity setting, it is possible to select a high shutter speed from 1/6000 sec. to a slow shutter speed of 30secs.
Most digital SLR cameras are typically vulnerable to dust entering the body especially when the lens is dismounted for changing. Dust and dirt entering through the lens mount of a digital camera, can create serious defects in image quality. The dust protector of the SIGMA SD10 prevents dust from entering and adhering to the image sensor. Even if dust adheres to the dust protector it will not have an influence on image quality, because the dust protector is located away from the image sensor and is therefore out of focus.
The coverage of a viewfinder of a digital SLR camera with interchangeable lens is almost the same as the picture seen on its image sensor. However, the coverage of viewfinder can be maximum 100%, and no portions of the outside area projected on the image sensor can be seen. SIGMA SD10 is equipped with a "sport finder" which offers a view that extends outside of the frame.
The area that is out of the image sensor coverage range is marked by transparent light gray, to distinguish it from the active picture taking area.
It is also important to monitor the area surrounding the photographic subject. In this respect, the sports finder makes the photographer aware of imminent photo opportunities.
Clearly marked operation panel buttons make it easy for photographers to identify and use desired functions. Each button of the Sigma SD10 is devised and arranged to provide a functional and easy-to-use setting. The SD-10 is probably the most user-friendly digital SLR. It is always ready to shoot, even when reviewing earlier images.
The mirror lock-up mechanism raises the mirror thus preventing vibration when the shutter is released. This prevents camera shake, and is especially effective for macro photography, shooting scenes using telephoto lenses or scientific work. Use of a remote controller or cable release (sold separately) also reduces the possibility of camera shake.
It is possible to adjust exposure in 1/3 EV steps increments up to }3 EV from the auto- exposure level set for the scene. In situations where it is difficult to determine proper exposure, the auto bracketing function allows a sequence of pictures to be taken of the same subject at three different exposure levels; Appropriate Exposure, Under Exposure and Over Exposure.
A high-speed CPU and high-volume buffer memory enable the SD10 to shoot at 2.5 frames per second for up to 30 consecutive frames in LOW mode, up to 14 consecutive frames in MED mode, and up to 6 frames in high-quality HI mode.
The SIGMA SD10 can transmit the images from camera to computer with high-speed IEEE1394 (Firewire) and widely available USB interfaces. IEEE1394 (Firewire)?@interface delivers super-high-speed image data transmission rate.
SD10 can be powered by two CR-V3 lithium batteries or four "AA" Ni-Mh batteries or four Nickel Zinc primary batteries or a dedicated AC adapter (included with the camera). Optional battery pack can hold four CR-V3 batteries or eight AA batteries more than enough power for most shoots.
When using the camera indoors for an extended period of time or transferring the imaged to the computer, it is advisable to power the camera from a socket using the AC Adapter (provided).
The Sigma SD10 records on reliable, high capacity Type I and Type II CF (CompactFlash) cards or a Microdrive to hold larger volumes of data.
The SIGMA SD10 is equipped with a large 1.8 in. appr.130,000 dot low temperature polysilicon TFT-LCD monitor with white LED on the back panel, which displays images, menus and histogram. The coverage area of the LCD monitor is 100%, of that seen from the viewfinder and thanks to the LCD-monitor, the composition can also be seen easily.
By operation of +/- Controller, three types of screen display can be chosen; thumbnail display (9 images simultaneous display), Single-Image display, and a Zoom-in display (the area of magnification can be freely chosen by the 4-Way Controller). By pressing the INFO button, detailed image information can be displayed on the TFT-LCD monitor, such as shutter speed, aperture value etc.
SIGMA SD10 camera’s video output system can be switched between PAL system (used in Europe, etc.) and NTSC system (in Japan and the U.S., etc.). This means that video output of SIGMA SD10 pictures is possible in many parts of the world.
It is possible to enjoy the S-TTL Wireless Flash, if two optional electronic EF-500 DG SUPER flashguns are used. In the "Wireless Flash" mode, the camera will control the flash power level automatically.
source and copyright: Sigma
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