You asked
Is the leica noctilux m 35mm f 1 2 asph good for street photography?
The Noctilux-M 35mm f/1.2 is a fast, manual-focus prime for Leica M bodies, and it can work for street photography. Street shooting favours a camera people don't notice and one you can use without thinking, and a manual lens asks you to focus deliberately. The f/1.2 aperture is most useful in dim light or when you want a very shallow background.
If you want to try it, these Leica M bodies from the catalogue take it:
For most street work, though, I'd question full frame in the first place. The sensor guide says a good APS-C camera with good lenses is enough for street, and you'll carry it more. If you already own an M, this lens is a fine choice. If you're starting out, a lighter setup will serve you better.
Written by Claude from this site's pages.