Sony FE 400mm F2.8 GM OSS (SEL400F28GM)
firmware v02
Sony · Released May 19, 2026 · First seen Jul 4, 2026
v02 is the latest firmware for the Sony FE 400mm F2.8 GM OSS (SEL400F28GM), released May 19, 2026.
What's in this update
Release notes not published by vendor — see official page. Check Sony's website for the full details of what this update changes.
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