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Fujifilm GF 50mm f/3.5 Aperture Series: Deck Planks (massive focus shift)

I had forgotten just how severe focus shift is with the Fujifilm GF 50mm f/3.5 at close range—about the worst I have ever documented, but only at close range.

As it bit me when making some tests, I decided to document it with another subject entirely different from the first two:

Fujifilm GF 50mm f/3.5 Aperture Series: Deck Planks

Includes images up to full camera resolution from f/3.5 to f/22.

Fujifilm GF 50mm f/3.5 Aperture Series: Mining Cabin Interior

Fujifilm GF 50mm f/3.5 Aperture Series: Burned Pine Among Boulders

The behavior shown in these series is critical to understand for those looking for the best possible results from the Fujifilm GF 50mm f/3.5 at close range.

I feel increasingly disappointed with Fujifilm GF glass because focus shift this strong means that the risk of sub-optimal results rises dramatically. Undue time-wasting care is required when focusing to compensate for the focus shift, but with autofocus it’s a total disaster since the Fujifilm GFX100S/100 focuses wide open with no feature to compensate for focus shift (at least not that I know of). And its variability and accuracy are marginal to begin with. So I again point to my recent essay on real-world capture resolution vs lower resolution cameras like the Sony A1.

f3.5 @ 1/640 sec electronic shutter, ISO 100; 2021-05-02 15:18:09
Fujifilm GFX100S + Fujifilm GF 50mm f/3.5 R LM WR @ 41mm equiv (50mm) RAW: LACA corrected, vignetting corrected

[low-res image for bot]

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