You asked
Is the leica summilux m 24mm f 1 4 asph good for street photography?
Yes, I think the 24mm f/1.4 is a good street lens. It's wide enough to take in the scene around your subject, and f/1.4 gives you room in dim streets. It's manual focus only, so it suits people who like to zone focus and shoot deliberately.
Street work rewards a camera people don't notice, so I'd pair this lens with one of the smaller Leica M bodies. Among the cameras it fits, I'd look at the Leica M-D (Typ 262), the Leica M-E (Typ 220), or the Leica M (Typ 240). Full lens details are on the Leica Summilux-M 24mm f/1.4 ASPH page. For how small and quiet gear fits street work, see the Street guide.
Written by Claude from this site's pages.