reacquired- or borrowed (for me)
That would be the 50 F/1 Noctilux. Many, many years ago I got it on loan (trying it three times) for photo projects. When I was younger I was sure at some point I would buy this lens. I think I convinced myself the F/1 would be perfect for those particular photo stories. Each time the results never lived up to my expectations. On the other hand - my 35, 50, 80 summilux R lenses produced excellent results. I think the grass is always greener................especially when you're young