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X3F is a raw image file format used by Sigma digital cameras to store unprocessed photo data directly from the camera sensor. It retains all the image details without compression, allowing photographers greater flexibility in post-processing. This format is essential for photographers who want maximum control over editing their photos. Interestingly, the X3F format was introduced with Sigma's Foveon sensor technology, which captures color information differently from traditional sensors.
The X3F format stores raw sensor data from Sigma’s Foveon X3 sensors, which capture color in three layers, one for each primary color, unlike traditional Bayer sensors. This unique technology allows for higher resolution and color accuracy in images. The file structure includes metadata alongside the raw image data, aiding in detailed adjustments during post-processing. Support for X3F files is primarily provided by Sigma's proprietary software, though third-party converters and plugins have been developed over the years.
Files with the X3F extension contain layered image data that preserves full color and tonal range, making it ideal for high-quality photo editing. Because it's a proprietary format, not all photo editing software supports it natively, often requiring specialized plugins or software like Sigma Photo Pro. The format helps photographers avoid quality loss due to compression or in-camera processing. X3F images are typically large in size, reflecting their rich information content.
No specific conversions to X3F are available at the moment.
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