Fujifilm GFX100S: ETTR at ISO 100/50, Histograms and More (Birches in Winter + Color Card)

2024-03-02 • SEND FEEDBACK |
Related: Base ISO, Expose To The Right, exposure, Fujifilm, Fujifilm GFX100S, Fujifilm medium format, Fujifilm mirrorless, histogram, ISO Lo, LibRaw, medium format, please fix this, please fix this camera, please fix this Fujifilm, RawDigger, weather events, Zebra display

Fujifilm GFX100S

This page is aimed at RAW shooters. It explores ETTR practices for the Fujifilm GFX100S using 16-bit captures at ISO 100 vs ISO 50.

RAW capture or RAW+JPEG is presumed with the intent to process RAW and discard the JPEGs (even so, shooting RAW+JPEG is useful for superior image review in camera).

• ETTR exposures from +0 to +5/3 stops at ISO 50 and 100.
• Proof of equivalence of ISO 100 vs 50.
• Camera RGB histograms for Live View and captures and how they correspond to real RAW data as with RawDigger.
• Recommendations for ETTR shooters.
• Usability issues for ETTR shooters.

Fujifilm GFX100S: ETTR at ISO 100/50, Histograms and More (Birches in Winter + Color Card)

Includes screencast video walkthrough.

Similar findings apply to the rest of the GFX100 series. The Fujifilm GFX100 II has a bit better quality with its real base ISO of 80, but the same behaviors should be seen there.

f7.1 @ 1.0 sec, ISO 100; 2024-03-01 12:22:15
Fujifilm GFX100S + Fujifilm GF 35-70mm f/4.5-5.6 WR @ 42.6mm equiv (51.8mm)

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