Featuring three layers of photo detectors to sense the three primary colors of light, the Foveon X3® direct image sensor captures color fully and completely. The result is ultra-high quality images offering pure, rich color and fine detail.

Joining the SD series for the first time, the TRUE II image processing engine is Sigma’s proprietary system for quickly and optimally processing Foveon X3® direct image sensor data.

Sigma's RAW data is broad in dynamic range, rich in harmony and color, and ideal for professional-level finishing. For access to this ultra-high-quality data, Sigma offers RAW mode and the .x3f data format.

SIGMA Photo Pro 4.0 brings out the best in the high-quality .x3f format data captured by the precision Sigma lens. Easy and intuitive to use, this propriety application gives photographers what they need to finish their photographs perfectly.