ERF Converter
Convert files to and from ERF online for free. Fast, secure, and high-quality file conversion with no sign-up or software required.
Maximum file size is 1GB
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What is an ERF file?
The ERF (Epson Raw Format) is a proprietary raw image format generated by Seiko Epson digital cameras, specifically the R-D1 series. Structured as a TIFF-compliant file, it stores unprocessed sensor data directly from the CCD or CMOS image sensor, preserving high dynamic range and color fidelity prior to demosaicing. The format typically utilizes lossless compression or uncompressed storage to maintain data integrity for post-production, requiring specific Bayer interpolation algorithms to render viewable images.
How to open an ERF file
ERF files are not natively viewable in standard Windows or macOS image viewers without codec extensions. Professional post-processing software such as Adobe Photoshop (via Camera Raw), Adobe Lightroom, and Capture One provide full support for decoding and editing the raw data. For free alternatives, users can utilize RawTherapee or Darktable, which contain the necessary libraries to interpret the specific sensor data from Epson hardware.
ERF Technical Info
- Full Name
- Epson Raw File
- Developed By
- Seiko Epson Corporation
- Initial Release
- 2004
- MIME Type
- image/x-epson-erf
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