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We're at a point where "vintage" analog glass gets auctioned off for more than a focal equivalent modern chinkshit f0.69 lens with IQ so sharp you can cut yourself with it once stopped down to like f2.8, where the film era lenses are still mired in coma, bloom, low contrast, flaring. Especially with western prices of eastern bloc lenses. I started out with film and moved up to mirrorless for the infinite cheap/old system adaptability but if I'm to choose between a $125 17mm f2.8 vivitar that still looks shit with sperical aberration and an uneven focusing plane at f8 or a $190 18mm f2.8 that's sharper wide open, has autofocus etc, unless you're a masochist or want to use it with film, it's a no-brainer.
Eastern bloc glass is only worth it when you're starting out, to learn the focals, or if you're after that le veentage look.
Pic related, the Jupiter-8 I don't use because I found an f1.05 7artisans chinkshit that's sharper at f2 than the jupiter at f8 for 100eur. Have fun with your cheap shit lenses, brothers. I know I did.