Looks for Mirex Adapter for Nikon F or Canon EF to Sony E-Mount
re: Sony A7R IV in for Repair of Lens Mount / Sensor Parallelism Problem
re: Lens Mount / Sensor Parallelism Afflicts All Brands
MiREX used to make a lens adapter for Sony E-mount that took a Canon EF-mount lens. Not sure if there was a Nikon F-mount adapter.
Specifically, I need a high quality adapter that allows the lens to rotate 180°, the purpose being to determine sensor swing and tilt using a known-good lens by allowing the opposite side to be compared using the exact same area of the lens (a micrometer must be also used to establish adapter thickness variations).
Failing finding MiREX one, I might have to reluctantly try the Kipon Shift Adapter for Canon EOS EF Lens to Sony E Mount, which I am reluctant to use given my past negative experience with KIPON.