You asked
What are the alternatives to the voigtl nder color skopar 50mm f 2 2?
I don't have a list of other Leica M lenses on this page, so I can't name direct swaps from the catalogue. The page does tell you the Color-Skopar is manual focus, with no stabilisation, and that it fits Leica M bodies.
If you want a 50mm, the portraits guide calls the 50mm f/1.8 "the cheapest great lens in photography," and it's a little faster than this f/2.2. Check that it's made in your mount before you buy. For a broader look at standard primes, see lenses.
Written by Claude from this site's pages.