Mechanical Focal-Plane Shutter Curtain Velocity & Capping Tester via Screen Scan

Deterministic Known refresh-rate raster phase slant regression + slit-width curtain trajectory v1(x), v2(x) differential exposure solver engine (.jpg, .dng, .arw, .cr3) built for Leica M6, Nikon FM2, Sony A7 III, Canon 1DX — zero-upload ephemeral Wasm RAM execution.

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