>>3285292>Are vintage lens worth buying?In general, yes.
But modern autofocus dSLRs are really not built for focusing them, it's a lousy experience.
If you use a crop body, the mirror is smaller (half the size) so it makes it harder to focus.
Also, no matter what body you use, the focusing screen is not fine enough to facilitate manual focus, and there are no focusing aids (microprism collar, split screen, etc.).
If you can change the focusing screen in your camera, it really makes focusing a much better experience. Of course, for mirrorless that's not an issue.
But in general, vintage lenses are fun. You can go for classic designs with a distinctive look, or for more modern ones (anything after '70's) which are very very close to their modern equivalents. Zooms though are almost all shit until the late '80's and '90's.