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Fujifilm GFX100 Lossless Compression Space Savings for 2.5 Week Shoot totalling 4811 Files

In Sony A7R IV Looks Flawed for My Purposes: Appear to Lack Focus Stacking Support and Lossless Compressed RAW, I called out Sony’s lack of a lossless compressed file format.

I wondered how much Fujifilm’s engineering wisdom had saved me on my recent 2.5 week shoot which totalled 4811 files. The wisdom being a lossless compressed raw file format.

How much space does Fujifilm GFX100 lossless compression save in practice?

I extracted the file size and bits per pixel for all files using exiftool, then computed the savings.

These figures stem from 4811 files shot during a 2.5 week trip field shooting the GFX100. Nothing more real-world than that!

Most images were 14-bit lossless compressed shot for FOCUS BKT images for focus stacking.

3593 files, 14-bit: average size 97.0 MB   ~= 54% savings
1218 files, 16 bit: average size 124.15 MB ~= 41% space savings

Uncompressed 14-bit and 16-bit file size is 209.6MB. MB = 1000^2.

These are major savings showing the great value of lossless compression.

Not only does a lossless compressed raw file format cut the space required out in the field for shooting (without compression, I would nearly have run out of space on dual 128GB cards one day), storage on the computer is hugely reduced, backup times and data verification times are shortened etc.

While Sony penalizes its customers by failing to incorporate a lossless-compressed format, Fujifilm respects its customers by providing an awesome solution saving time and money. It’s awesome because lossless compression savings of 54% are impressively good (see my compression patents—I say this as an expert).

Vertical axis is number of files, horizontal axis is file size in MB. Toggle to compare 14-bit to 16-bit.

File size distribution for Fujifilm GFX100 from 2.5 week field shoot
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