Lensrentals.com founder Roger Cicala publishes teardowns of high-end modern lenses and I recall that he and his team occasionally (often?) find shims used to ca

Lensrentals.com founder Roger Cicala publishes teardowns of high-end modern lenses and I recall that he and his team occasionally (often?) find shims used to calibrate the optics. https://www.lensrentals.com/blog/author/roger/ https://www.lensrentals.com/blog/author/roger/