analog.universe
TPF Noob!
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In all honesty, this "they are not accurate" nonsense most likely comes from poor distance estimation, not bad scales on the lens.
You are testing with reasonable quality lenses.... Most of the complaints I've heard about scale accuracy are from cheapo lenses, where either they didn't care enough to print a legit scale, or the construction tolerances are so sloppy that it's only accurate on certain copies etc. Isn't that originally how the soft infinity stop came about? They couldn't get the tolerances tight enough on more complicated autofocus designs?