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Of corse, the one lens every one skirts around is the EF 85mm f1.4 L IS, a stunning performer. Both optically, size. weight and AF is just amazing. But because it was an F1.4, it' often over looked by us bokeh junkies, I certainly am! Canon could have made this lens an f1.2 easily but synically chose not to. They knew the RF mount was coming.
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Just speculation and personal experience here, but my brand new ef 85mm f.4 L IS was never very good. It focused adequately, and it had ok IQ, but other than being better with purple fringing, I didn't see it as any more pleasing than the ef 85mm f 1.8, and the bokeh on mine was jittery. I thought it was very much like older Sigmas.
The speculation part of my post is this: Maybe there was a wider range of manufacturing tolerance for it, and some copies, such as yours, were great, while a substantial number were underwhelming. Maybe it was a stepping-stone for Canon, or a lens that had been in the works for years and was put out just as the RF era was dawning within Canon.
I agree that there are lens snobs, but some lenses are more universally acclaimed and loved than others for genuine reasons.