What is an X3F File?
The .X3F files are created by SIGMA digital cameras to store high-end RAW images captured by the Foveon X3 camera sensors. An X3F file contains data for a single image, along with other content such as its metadata, thumbnail, and preview image. Since these files are uncompressed, they can take up a significant amount of storage space.
X3F files can be opened and used with different viewing and editing programs listed below.
Download X3F Sample Files
To download .X3F files for testing purposes, click on the respective link below to the file available in different sizes.