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Fujifilm GFX-100

Fujifilm GFX100: File Sizes in 16-bit vs 14-bit Capture

The Fujifilm GFX-100 offers lossless-compressed raw file captures (the ideal format) in both 14-bit and 16-bit captures, as well as uncompressed files.

File sizes: Uncompressed vs Compressed in 14-bit vs 16-bit

It’s unclear why one would want to record uncompressed files at all since the raw file processing time in Adobe Camera Raw is only a fraction of second slower as compared to compressed raw.

Saving 14-bit uncompressed raw files produces the same file size as 16-bit uncompressed files, which is needlessly wasteful, since bit packing without compression could reduce file size by 13%. Therefore, 14-bit capture uses two bytes per pixel (16 bits) just as does 16-bit capture, without any bit packing and always including two bits set to zero for each pixel. This approach needlessly increases transfer time to/from card and backing up on the computer by 13%, but other vendors do the same thing.

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RAW file sizes for Fujifilm GFX-100, and corresponding Super-Fine JPEG

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