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EXCERPT page containing first few paragraphs. 2023-09-22 17:28:33
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Fujifilm GFX100S

Fujifilm GFX100S: Focus BKT @ 67mm Fails to Reach INF (Leavitt Meadows)

This page shows proof of failure to reach infinity ("INF") focus using Fujifilm GFX100S/GFX100 Focus BKT feature.

See also: Fujifilm: Focus BKT is Blurry for last frame (INF focus) — Please Fix ASAP — You’ve Had FIVE YEARS

This example is the same kind of failure seen 4 years earlier with the Fujifilm GFX100. It seems to affect medium and long focal lengths the most, usually succeeding with shorter focal lengths.

Here in 2023, Fujifilm has clearly not made Focus BKT a reliable feature. We are stuck with problems that I first reported upon back in 2019 with the GFX100.

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Variants LastFrame,MF_INF available in full article
f9 @ 1/80 sec electronic shutter, ISO 100; 2023-07-11 13:37:07
Fujifilm GFX100S + Fujifilm GF 35-70mm f/4.5-5.6 WR @ 55.6mm equiv (67.6mm) + polarizer Breakthrough Photography X4
ENV: Leavitt Meadows overlook, altitude 7200 ft / 2195 m, 75°F / 23°C
RAW: vignetting corrected, WB 5500°K tint 30, pull 0.35 stops, +100 Shadows, -70 Highlights, +20 Whites, +30 Dehaze, +10 Clarity, diffraction mitigating sharpening

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