What is a .X3F file?
X3F is Sigma’s camera RAW format, produced by its Foveon X3 sensors. Opened in Sigma Photo Pro.
- Did you know
- X3F stores data from Sigma’s unusual three-layer Foveon sensor, which captures colour very differently to ordinary sensors.
- The “X3” in X3F refers to Foveon’s X3 sensor, which stacks its red, green and blue layers vertically much like the emulsion layers of colour film.
- Because each location records all three colours directly, X3F data needs no colour interpolation, unlike the Bayer-mosaic files of ordinary cameras.
- X3F has appeared across Sigma’s SD digital SLRs and dp Quattro compacts, the cameras built around the Foveon sensor.
- Sigma’s own Sigma Photo Pro software is the reference tool for developing the raw data inside an X3F file.
- What Analyser shows you
- Open camera RAW files from Sony (ARW), Canon (CR2, CR3, CRW), Nikon (NEF, NRW), Fujifilm X-Trans (RAF), Sigma Foveon (X3F), Olympus (ORF), Panasonic (RW2), Pentax (PEF), Adobe DNG and many more. Reads full EXIF and lens data, the true sensor resolution, GPS and histograms, recovers the Sony and Nikon shutter actuation count, and develops the RAW - decoding the sensor to a full-resolution image, or extracting the embedded preview when a true demosaic is not available.
- Open a .X3F file
- Drag a .X3F file onto the Analyser home page (or tap to pick one). It opens entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.