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Blog posts, reverse chronological


2021-05-07 Test Protocol for Focus Creep / Unstable Lens Focus

2021-05-06 Voigtlander FE 35mm f/2 APO-Lanthar Aspherical: what looked like focus shift is *partly* shown to be Focus Creep / Unstable Lens Focus

2021-04-04 Voigtlander FE 65mm f/2 APO-Lanthar Aspherical Defocuses Itself When Angled Up or Down (Focus Creep)


2019-07-23 Fujifilm GFX100 and Lenses Firmware Updated, Software Engineering by Fujifilm Needs More Attention to Detail, Usability

2019-07-23 Fujifilm Focusing Issues in the Fujifilm GFX100 Have Existed for At Least 6 Years in Fujifilm X Series Also

2019-07-22 Shootout: Fujifilm GF 110mm f/2 R WR vs Fujifilm GF 100-200mm f/5.6: Mosaic with Unstable Lens Focus (Fujifilm GFX-100)

2019-07-22 Fujifilm GFX-100: ISO 50 vs 100, Sensor Transit Time, 16-bit vs 14-bit Capture, Unstable Lens Focus

2019-06-13 Leica 75mm f/2 APO-Summicron-SL ASPH: Focus Instability

2019-06-12 Leica 90mm f/2 APO-Summicron-SL ASPH: Focus Instability


2017-07-15 Reader Comment: Nikon 28mm f/1.4E ED, Fujifilm GF Focus Stability


2013-09-05 Sony RX1R: Unstable Manual Focus

2013-07-11 Compared: Zeiss Touit 32mm f/1.8 Planar vs Fujinon XF 35mm f/1.4 and 18-55/2.8-4 (X-E1, Ellery Lake Green House)

2013-07-11 Comments on Fujifilm X System

2013-07-10 Fujifilm X-E1 Kit: Returned Entire System for a Refund

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