- Extension
- .x3f
- .g4
- Format
- Binary
- Binary
- Category
- Camera
- Fax
- Developer
- SIGMA
- Computer Fax Systems (CFS)
- Description
- The X3F file format, also known as the SIGMA X3F Camera RAW File, is a proprietary image format developed by Sigma Corporation for storing raw image data captured by Sigma cameras equipped with the Foveon X3 sensor. Unlike standard JPEGs or TIFFs, X3F files contain unprocessed data from the camera's sensor, offering photographers greater flexibility in image editing.
- Group 4 (G4) used for black and white lossless compression to maintain high-quality images, commonly used in TIFF format compression by fax machines. A picture is seen as black dots and lines on a blank page; the fewer the dots and lines are, the lesser the file size.
- MIME Type
- image/x-sigma-x3f
- image/g4fax
