I'm not a wide-angle shooter by nature. I rarely use the wide end of zoom lenses, so wide primes are not a thing I typically have in my kit.
The widest prime lens I use with any regularity is the Fujifilm XF 23mm f/2 R WR. With a field of view equivalent to a 35mm lens on a full-frame body, the compact little "Fujicron" is fast, sharp, and (like it says on the label) weather resistant.
When I'm shooting with longer glass on my Fujifilm X-T2, I'll bring the XF 23mm f/2 along, mounted on my X-E1, to handle wide interiors, streetscapes, and other similar chores.
Plus, I really love the way it looks with that retro vented hood. I keep telling myself that I'll be an ace street photographer with this setup someday... someday. First I'll have to overcome my reluctance to get up in people's grilles with such a relatively wide lens, though.
