You asked
Leica noctilux m 50mm f 1 vs leica noctilux m 50mm f 0 95 asph?
Both are 50mm manual-focus primes for full frame Leica M bodies, and neither has stabilisation. The difference is the aperture and the age of the design. The Leica Noctilux-M 50mm f/0.95 ASPH is the newer, faster of the two and the fastest M lens I cover. It's heavy, and focus is very thin wide open, so expect to work for sharp focus at its widest setting.
The Leica Noctilux-M 50mm f/1 is the older design, made from 1976 to 2008. It's a touch slower, but it's still a Noctilux and it fits the same Leica M bodies.
I'd pick the f/0.95 ASPH if you shoot in very low light and want every bit of speed. If you want the Noctilux look without chasing the widest possible aperture, the f/1 is a good choice. If you're after a faster standard lens for general use, see primes or zooms.
Written by Claude from this site's pages.