Back in my Canon days, I bought a few adapters (Nikkor -> EOS, M42 -> EOS, &c) and managed to find quite a few semi-antique manual lenses from ex-East Germany, Ukraine, Japan…
When I bought my Fuji X-T1, all I had to do was to buy an EOS -> X-mount adapter and all my old manual lenses were good to go.
There are, of course, a lot of different reasons/rationale to use a semi-antique manual lens, but take an 50mm Industar 61 L/Z as an example: it has the very best focusing helix I have ever encountered
Anyone else playing with manual lenses?
Claes in Lund, Sweden