Back when I used film, my most used lens was a FD 50mm/1.4. My last film camera is the venerable Canon T-90. I really liked that 50/1.4. When I moved to digital I naturally bought the EF 50/1.4 but never ended up liking it much. Eventually sold it and the 24-70 became my go to lens, later replaced with the 24-105. I still have the T-90 with 50/1.4 (I sold off other FD lenses). I came across a FD-RF adapter the other day and picked it up for $17. I put this combination on my R5 and so far liking the results. Just received the adapter today and fired off a few test images. Looks good so far.