Sigma DP-1 Merrill Digital Camera with 46 Megapixel, FOVEON X3 Direct Image Sensor, Fixed 19mm f/2.8 Lens Foveon X3 Merrill Sensor: The Foveon X3 direct image sensor captures all primary RGB colors at each and every pixel location with 3 layers, ensuring the capture of full and complete color. Since color moire is not generated, the use of a low-pass filter is not required, meaning light and color are captured by the sensor with a 3-Dimensional feel. Dual TRUE II Engine: The dual TRUE (Three-layer Responsive Ultimate Engine) II image processing engine dedicated to Foveon X3 direct image sensors improves the processing speed and overall quality of the final image. Exclusively Designed 19mm F2.8 lens: The high-performance 19mm F2.8 lens has the equivalent angle of view of a 28mm (35mm equivalent focal length) lens as has been designed exclusively for the SIGMA DP1 Merrill to maximizes the sensor performance. Advanced User Interface: The custom quick set menu and the metallic command dial are incorporated to improve usability. The diaphragm, shutter speed and menu can be changed quickly using the command dial. It allows photographers to change the menu content and the order depending on their preferences.