You asked
What are the alternatives to the leica noctilux m 50mm f 0 95 asph?
I don't have a list of other lenses for the Leica M mount on this page, so I can't name a direct Noctilux rival from the site. The page does tell us the Noctilux is the fastest M lens, heavy, and hard to focus wide open, so it's a specialist lens.
For most people, the more sensible route is the one the lens guide recommends: a fast standard prime, around 50mm at f/1.8 on full frame. It's far lighter, cheaper, and much easier to nail focus with, and it still gathers plenty of light for people and low-light shots. The Lenses guide explains the reasoning. If you want to see what else fits your camera body, check the camera's own page in the Leica M mount listing.
Written by Claude from this site's pages.