Reflection of Canada Malting Silos - Canon nFD 28mm f2.8 & Sony A7
Part of the reason the nFD 28mm f2.8 lens doesn't get much love, is because 28mm is a meh focal length for most users. It's too common and often the cheapest in the wide angle category, if you overlook the Zeiss Otus 28mm f1.4. The focal length sits between the ultra wide, normal. It doesn't give you the impact of the 20mm angle of view, and is too wide for normal use. But I kind of like this comfortable angle of view.
If you are looking for a very sharp wide angle lens that's cheap, this is the lens for you. Compared to my Leica-R Elmarit 28mm f2.8, the Canon is sharper at the corners and edges. Even wide open at f2.8, it's sharp and usable.
Toronto Downtown at Dusk - nFD 28mm f2.8 @ f2.8 & Sony A7, ISO 1600
The cheap price does not mean inferior build. In fact, this thing as nicely built as the nFD 50mm f1.2, with metal barrels and very smooth focusing. The only niggle I have is the 5-blade aperture, but then again, it was not designed for shallow depth of field or close up with a diffused background. I am more than happy with with it.
Canon nFD 28mm f2.8 on Sony A7
M.R. Kane - Canon nFD 28mm f2.8 & Sony A7 @ f8