Unbelievable, an RF 50mm f/1.4! That would be close to a real wonder, after maybe 20 years of speculation whether Canon would bring an optically improved upgrade in that classic "medium fast" 50mm section. The current EF 50mm f/1.4 hit the market in 1993 and really needs an overhaul. Optically, it is getting very soft in the edges wide open (though very sharp at f/5.6), and its micro USM drive is quite slow, plus it is not very reliably focusing wide open. I had this lens for some years and never was too happy with it.