X3Fuse

A modern macOS app for converting Sigma Merrill and Quattro X3F RAW files.

Overview

X3Fuse is a RAW conversion tool that converts your Sigma Merrill and Quattro X3F files into practical, compatible formats like DNG, TIFF, and JPEG. It's an essential bridge between your Sigma cameras and your preferred editing suite. Works best with Lightroom and Capture One.

Features

• Multiple Output Formats: Convert X3F files to DNG, TIFF, or JPEG formats
• Batch Processing: Process multiple files at once with an intuitive queue system
• Native macOS App: Built with SwiftUI for a seamless macOS experience
• EXIF Data Preservation: Attempts to preserve metadata like preferred aspect ratio
• Multi-language Support: Available in English, Japanese, Korean, and Chinese*
• Drag & Drop Interface: Simple file management with drag and drop support
• Conversion Settings: Customizable output options for your workflow

• Don't see your language? Help us translate! See Contributing below.

Supported Cameras

X3Fuse supports X3F files from Sigma cameras including Merrill and Quattro series cameras.

Camera Model	Tested	Untested
Merrill Generation
Sigma DP1 Merrill	✅
Sigma DP2 Merrill	✅
Sigma DP3 Merrill	✅
Sigma SD1 Merrill	✅
Quattro Generation
Sigma DP0 Quattro	✅
Sigma DP1 Quattro		🚫
Sigma DP2 Quattro	✅
Sigma DP3 Quattro	✅
Sigma SD Quattro		🚫
Sigma SD Quattro H	✅

If you have a Sigma Foveon camera from the Merrill and Quattro generations that are not listed here, please let us know! We aim to support all Sigma Merrill and Quattro cameras and are actively looking for additional test files to improve compatibility.

System Requirements

• macOS 14.0 (Sonoma) or later
• Intel or Apple Silicon

Installation

Option 1: Download Release

1. Download the latest .zip from the Releases page
2. Extract the .zip file and move the X3Fuse.app to your Applications folder.
3. Launch X3Fuse.app from your Applications folder.

Option 2: Build from Source

1. Clone the repository:

   git clone https://github.com/sagwaco/x3fuse.git
   cd x3fuse

2. Open X3Fuse.xcodeproj in Xcode
3. Build and run the project (⌘+R)

Scripts

verify_universal_build.sh

./scripts/verify_universal_build.sh

This script verifies that the app and its components are properly built as universal binaries. It checks the architecture of the main app executable and any embedded binaries, ensuring they support both Intel and Apple Silicon architectures.

Usage

1. Launch X3Fuse from your Applications folder

2. Add Files:

   • Drag and drop X3F files onto the app window
   • Or use File → Open to browse for files

3. Configure Settings:

   • Choose your output format (DNG, TIFF, or JPEG)
   • Set output directory preferences
   • Adjust conversion options as needed

4. Convert:

   • Click the Convert button to start processing
   • Monitor progress in the queue view
   • Converted files will be saved to your specified location

Known Issues

Compatibility issues with RAW compression on DNGs

DNGs that were created with the RAW compression setting enabled have reduced compatibility and may not open reliably in applications that do not use the Capture One or Adobe Camera Raw (Photoshop, Lightroom) decoders. If you encounter this issue, try disabling RAW compression in the application settings.

DNGs look broken in Quick Look

Foveon cameras do not have a color filter array (CFA) like most other cameras, and the lack of a CFA, among other differences, can cause some applications like Quick Look to misinterpret the RAW data. If you encounter this issue, please use an alternative viewer or editor to confirm the integrity of the DNG files. The files should open correctly in applications like Adobe Lightroom, Adobe Photoshop, or Capture One.

X3I files not supported

X3I files generated in Quattro Super fine detail (SFD) mode are not supported. A workaround is to shoot several exposure bracketed images as X3Fs and then use X3Fuse to convert them to DNG. In a photo editing application like Lightroom, you can then merge the DNG files into an HDR image.

Technical Details

X3Fuse leverages:

• x3f_tools: Core X3F file processing engine
• ExifTool: Comprehensive metadata handling

Acknowledgements

Thank you to the kalpanika team for x3f_tools https://github.com/Kalpanika/x3f:

• Roland Karlsson (roland@proxel.se)
• Erik Karlsson (erik.r.karlsson@gmail.com)
• Mark Roden (mmroden@gmail.com) - [anisotropic filtering parts]

License

This project is licensed under the terms specified in the LICENSE file.

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

Support

If you encounter any issues or have questions:

• Open an issue on GitHub Issues
• Check the Releases page for updates

Privacy

X3Fuse processes all files locally on your Mac. No data is sent to external servers.