Thought we could do with a proper thread for this now the place is filling up. What's the oddest bit of old glass you've got on a modern body, and does it actually get used or is it a shelf ornament?
I'll start. Helios 44-2 on the A7 III via a £12 M42 adapter. Everybody has one, I know, and the swirl gets old if you lean on it... but stopped down to f/4 it's a perfectly decent 58mm and the flare is lovely when the sun's low. The Takumar 50 1.4 lives on there most weekends. Also an FD 50 1.8 that cost me a fiver at a car boot near Aylsham, which is sharper than it has any right to be.
Weirdest one I've tried was a Jupiter-9 85mm I borrowed off a mate. Focus throw like turning a ship's wheel. Gave it back.
Go on then. Ones that cost under £50 count double. Just saying