Dynapik offers a free online tool to change image types - no need to download anything. It's quick and easy to use. You can change your RAF images to HDR format. This tool works for both professionals and casual users. Convert your images to HDR in seconds.
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Fujifilm RAW
The unique raw format for Fujifilm's X-Trans sensors.
RAF is the raw image format used by Fujifilm cameras. While it serves the same purpose as other raw formats, RAF files from Fuji's X-Series cameras are special because they contain data from the unique 'X-Trans' sensor array. Unlike standard sensors that use a Bayer pattern (2x2 grid), X-Trans uses a complex 6x6 pixel grid to reduce moiré without an optical low-pass filter. This means RAF files require specialized demosaicing algorithms to process correctly, making software choice more critical for Fuji users than for any other brand.
RAF files store the raw sensor data, a JPEG preview, and metadata. Fuji offers 'Uncompressed' and 'Lossless Compressed' options. The Lossless Compressed option is highly efficient, reducing file sizes significantly with no penalty. Because of the X-Trans pattern, RAF files can sometimes exhibit 'worm' artifacts when sharpened aggressively in Adobe Lightroom. This has led many Fuji users to prefer Capture One or Iridient Developer, which handle the X-Trans demosaicing better.
Fuji has used the RAF extension for decades, from their early FinePix DSLRs to the modern GFX medium format monsters. The format gained prominence with the release of the X-Pro1 in 2012, which introduced the X-Trans sensor.
Radiance HDR
The pioneering high dynamic range format for lighting simulation.
The Radiance HDR format (often called RGBE) is a raster image format designed for storing high dynamic range (HDR) data. Rather than standard 8-bit integers, it uses a specialized encoding where pixel colors are stored as Red, Green, and Blue mantissas sharing a single common Exponent (RGBE). This allows it to represent a vast range of luminance values, from direct sunlight to deep shadows, in a relatively compact 32-bit-per-pixel format.
The .hdr format consists of a human-readable header containing variables like exposure and gamma, followed by binary pixel data. The pixel data typically uses the 'Radiance RGBE' encoding. Each pixel is 4 bytes: one byte each for Red, Green, and Blue, and one shared Exponent byte. This 'shared exponent' scheme is efficient but introduces some limitations—if one channel is very bright and another is very dark in the same pixel, color precision can be lost (color banding).
Developed by Greg Ward in the late 1980s for the Radiance lighting simulation system. It was one of the first formats to enable practical HDR storage and became a de facto standard in the CGI industry for Image-Based Lighting (IBL).
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