Sigma DP2 Quattro compact digital camera. The SIGMA dp2 Quattro incorporates a newly developed Foveon X3 direct image sensor (generation name: “Quattro”). The new sensor structure features a pixel ratio of 1:1:4 from the bottom, middle to top layer. The Foveon X3 Quattro direct image sensor is able to detect a broad range of light wavelengths. While the top layer captures both brightness and color information, the middle and bottom layers with their larger surface area 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. Retaining the principle of the three-layer structure where colors are divided vertically, by applying the brightness data captured in the top layer to the layers below, high resolution and high-speed for broad data processing required are achieved.
Based on our rigorous examination of lens options to match the new Foveon X3 Quattro direct image sensor, we’ve retained the same lens specification as in the DP2 Merrill; 30mm F2.8 (equivalent to a 45mm lens on a 35mm SLR). Building on the well-received approach we took with the previous-generation DP2 Merrill camera, we’ve incorporated a glass mold aspherical lens and three high refractive index glass elements so as to minimize every type of optical aberration. Extremely sharp and stable in performance, this camera gives you the power to capture even tiny subjects with high precision. Its image plane characteristics are also outstanding, featuring a consistently crisp focus and a smooth, natural gradation to the out-of-focus areas of the image.
The Quick Set (QS) Menu which consists of the 8 most commonly used functions such as ISO and White Balance can be easily displayed by pressing the QS button. Using the Selector, the Front Dial and the Rear Dial, change of the settings can be made in no time. It allows photographers to change the menu content and the order depending on their preferences.