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EXCERPT page containing first few paragraphs. 2023-10-01 09:18:38

Fujifilm GFX

Blur and Image Deformation with Fully Electronic Shutter

See also GFX Technologies #4 - The Story of GFX Shutter Design.

Scroll down to the example to see the effects, then begin reading.

Across a variety of outdoor images, I had been puzzled over strange localized deformations from aperture to aperture even on rigid subjects, cases where there had been wind (so the camera could be jiggled a bit), but also very high shutter speeds in use. Part of the weirdness across apertures could be due to the poor focusing precision of the GFX and perhaps a bit of focus shift, but lacking the expected uniformity associated with those effects, my conclusion (to my chagrin) is that the deformations are in fact related to the rolling shutter effect caused by an all-electronic shutter.

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f1.2 @ 1/5400 sec handheld, ISO 100; 2017-04-25 17:26:17
GFX 50S + Olympus Zuiko Auto-S 50mm f/1.2 @ 33.7mm equiv (41mm)

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