Not so long ago I bought Rku. I had 50 1.4, it jammed in translation and missed the focus. Decided to sell it and take the 2022. It feels the same as the 50 1.8, a little flimsy. But it works very quickly, I like the quality of the photos, the backlight holds well, the bokeh is not bad. If you want as a staffer for a mirrorless camera, I think it's a great option. But 50 1.8 stm also has a good reputation, if you are not ready to overpay, you can take it.
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