Here is another Canon FL f1.2 lens in 55mm focal length. We looked at the FL 58mm f1.2 last time, and the bokeh leaves much to be desired. It's also not very sharp wide open, compared to other Canon f1.2 lenses. The FL 55mm f1.2 was a replacement lens for the 58mm f1.2. It has better multi-coating, but not the Super Spetra Coating (S.S.C) on the later lenses, but a precursor of it. The look and feel is very similar to the FL 58mm f1.2. Even though both lenses have an 8-blade aperture, the FL 55mm f1.2 is more rounded whereas the FL 58mm f1.2 is edgy. That probably has something to do with the (slightly) better looking bokeh of the 55mm f1.2.
Three Doors -- NEX-5N & Canon FL 55mm f1.2 @ f1.2. Click for larger.
Optically, the FL 55mm f1.2 is quite sharp wide open. Again, not as good as the later 55mm f1.2 S.S.C or the nFD 50mm f1.2, but better than the FL 58mm f1.2. From f2 on, the lens is very sharp. From experience, most of these fast lenses are very good when stopping down only one stop.
Bokeh -- NEX-5N & Canon FL 55mm f1.2 @ f1.2. Click for larger.
I do enjoy using this lens. It's not as big or heavy as the FD 55mm f1.2 S.S.C and focuses very smoothly. It also has a A/M switch for the aperture, not that it's important when used on EVIL cameras, as the adapter would always engage the lens in stop-down mode, essentially having a built-in manual aperture switch.
A nice lens to shoot in low lights, for sure.
Pigeons on grass -- NEX-5N & Canon FL 55mm f1.2 @ f1.2. Click for larger.