X3F to PDF
Share a Sigma X3F photograph as a one-page PDF for catalog review. Its sensor data is developed to 8-bit sRGB pixels, not preserved as separate layers.
Format Comparison & Technical Specifications
| Specification | X3F | |
|---|---|---|
| MIME Type | - | application/pdf |
| Type | - | document container |
| Compression | - | Flate / JPEG / JBIG2 / CCITT |
| Standard Specification | - | ISO 32000-2:2020 |
| Magic Bytes Header | - | 25 50 44 46 (%PDF) |
Format Overview & Applications
A catalog reviewer can compare a Sigma frame in a PDF, while Sigma Photo Pro remains an option for returning to source-specific rendering.
Technical Specifications & Codec Breakdown
LibRaw handles X3F with the configured camera white balance, camera matrix, AHD demosaicing and sRGB 8-bit output, yielding a regular RGBA page image.
OS & Browser Compatibility
Sigma Photo Pro is intended for working with Sigma captures; a PDF copy gives catalog staff a standard page to view without opening the X3F source.
Useful info
Inspect fine color transitions in the raw application before approval; the PDF records the LibRaw-developed 8-bit result, not separate Foveon sensor layers.
Format Comparison & Technical Specifications
A 5424×3616 Sigma X3F selection sheet image occupies 36.2×24.1 inches at 150 dpi.
Frequently Asked Questions
Are Foveon sensor layers preserved as separate planes?
The source is developed to ordinary color pixels and the PDF embeds that single raster view.
Which settings affect the rendered color?
The configured path applies camera white balance and camera-matrix color and asks LibRaw for sRGB output.
Does a Sigma reviewer get separate sensor-color layers?
No; the page shows the developed image, so keep X3F for source-level processing.