You asked
Is the leica noctilux m 75mm f 1 25 asph weather sealed?
I don't have weather sealing listed for the Leica Noctilux-M 75mm f/1.25 ASPH. Its page covers the focal length, f/1.2 maximum aperture, manual focus, lack of stabilisation and the Leica M bodies it fits, but says nothing about sealing. I won't guess, so check Leica's own documentation before you take it into rain or spray.
If sealing matters for your shooting, it's worth a look at the Landscape guide, which explains why a sealed body and lens count when you're out in wind, spray and drizzle. A wide-open 75mm is also a lens you'll mostly use for portraits, so the Portraits page may help you decide how much weather protection you need.
Written by Claude from this site's pages.