I’ve never gotten comfortable using old manual-focus lenses on modern cameras. I tried a few times with earlier cameras like the Olympus E-P1 and Zeiss Biogon and the Fuji X-E1 with Leica 9cm Elmar but the experience was terrible.
Fuji recently released a major firmware update to the X-T1 so I was playing around with it while reading John Caz’s excellent Setup Guide. I learned a few things, and one of those was that the X-T1 has improved the way it handles manual-focus lenses, so I threw on the Leica 50mm Summicron and took a few quick test photos. The combination handles much easier than expected and the images look pretty good so far.