The Nikkor 40mm f/2 (SE version, but that's just a window-dressing variant to extract more money from the hard-core old-timers) is in fact a surprisingly nice and versatile optic, despite its plastic design. It is further endeared by being a very capable performer in Infrared too. I'm on my third sample now; first was the "wrong" non-SE version so I traded it in, the second was stolen (together with my black Zfc) thus I purchased another 40 SE + black Zfc to replace these items. I had similar experiences with all these copies. Handling on the Z fc is perfect and on the Zf, nearly so as well.