曝光
| 测光 |
Spot, Centre-weighted, Evaluative (Multi-pattern) |
| 曝光类型 |
Auto |
| 曝光控制 |
Program AE |
| ISO感光度（最低） |
100 |
| ISO感光度（最高） |
6400 |
| 自动曝光（AE）锁 |
Y |
照相机
| 照片效果 |
Vivid, Neutral, Cinema |
| 自拍 |
2, 10 s |
图片质量
| 总计百万像素 |
33 MP |
| 最大图像分辨率 |
7680 x 5120 pixels |
| 支持的视频格式 |
RAW, JPG |
| 像素 |
29 MP |
| 传感器类型 |
CMOS |
| 图像传感器尺寸（宽×高） |
23.5 x 15.7 mm |
| 图像稳定器 |
N |
| 相机类型 |
MILC |
聚焦系统
| 固定焦距 |
30 mm |
| 最大光圈 |
16 |
| 光阑叶片数量 |
9 |
| 最小光圈 |
2.8 |
快门
| 相机快门速度（最大） |
30 s |
| 相机快门速度（最小） |
1/2000 s |
聚焦
| 一般对焦范围 |
0.28 - ∞ m |
| 焦距调整 |
Auto/Manual |
| 自动对焦（AF）模式 |
Contrast Detection Auto Focus, Face detection |
另外
| 镜头结构（元素 /组） |
8/6 |
| 包括 AC 适配器 |
Y |
dp2 Quattro, Foveon X3 CMOS, 23.5 x 15.7mm, 33MP, 7680 x 5120, ISO 100 - 6400, 7.62 cm (3 ") TFT LCD, USB, SD/SDHC/SDXC
<b>Key Feature of SIGMA dp2 Quattro</b>
Equivalent to 39 megapixel high resolution
The SIGMA dp2 Quattro incorporates a newly developed Foveon X3 direct image sensor which features a pixel ratio of 1:1:4 from the bottom, middle to top layer. While the top layer captures both brightness and color information, the middle and bottom layers capture color information only. During the image data processing stage, the brightness data captured in the top layer is applied to the top, middle, and bottom layers, resulting in brightness and color data for each individual pixel. When measuring with a standard monochrome resolution chart, the dp2 Quattro has high resolution equivalent to approximately 39 megapixels. The Foveon direct image sensor, which uses superior vertical color separation technology, does not require a low-pass filter as there will be no false colors in principle, resulting in high-definition, 3D-like photographs with outstandingly rich color detail.
<b>Overexposure Correction</b>
The SIGMA dp2 Quattro incorporates a new overexposure correction function. This function is to minimize blown-out highlights caused by overexposure on JPEG data, based on the gradation information obtained through the arrangement of pixels on the sensor. Moreover, such gradation information can be utilized in expansion of dynamic range by processing RAW data. For example, when sky is blown-out as shown in the pictures below, the color of sky will not change much by applying overexposure correction in SIGMA Photo Pro 6. In such a case, by moving the exposure slider to the minus side, and then with overexposure correction, blue sky can be reproduced. Moreover, by moving X3 Fill Light slider to the plus side to brighten the darkened part enables the reproduction in a state closer to that seen with the eye.
<b>Notice for when photographing a backlit scene</b>
When photographing a strong light source such as sunlight directly, flare and ghosting may occur as shown below. In such a case, by processing the image through SIGMA Photo Pro 6, it is possible to make it less visible. Using the fringe correction function during processing has an even better effect. At that time, it is necessary to use color adjustment function to adjust color as saturation may be lower.
<b>Adjusted in SIGMA Photo Pro</b>
Occasionally, among green flare caused by a backlit environment, picture elements for overexposure correction might appear. In such a case, processing the image through SIGMA Photo Pro 6 will make it less visible.
<b>The Next Generation of Compact Cameras</b>
- Fixed 30mm 2.8 Lens specifically designed for sensor
- Newly designed Foveon sensor with 30% resolution gain from Merrill generation
- Improved optics, ISO performance, image processing and design
Redesigned in every aspect, including the sensor, engine, lens and body, the dp Quattro Compact Camera series embodies Sigma’s philosophy of creating cameras that produce works of art. The dp2 is the first camera in the new Quattro series to be released, with a dp1 and dp3 Quattro to follow. The dp2 is stocked with a fixed 30mm 2.8 standard lens designed specifically and lined up perfectly with its new Foveon X3 Quattro sensor to create exceptional images. Renowned for unmatched image quality, the Foveon image sensor is Sigma’s proprietary technology which captures transmitted light in a vertical 3 layer sensor with dedicated layers to Red, Green and Blue. The only one of its kind, the Foveon sensor produces full bodied images, rich in tone, gradation, and texture with a 3D feel to them. The new Foveon X3 Quattro offers an even higher level of image purity with an increase in resolution to the previous Foveon sensor, sure to bring about new experiences in your photography. The dp2 Quattro was designed and created for true artistic endeavors and also touts improved processing speed, autofocus performance and better high ISO capabilities than its Merrill predecessors.
