You asked
Is the ttartisan apo m 35mm f 2 asph sharp wide open?
I haven't tested the TTArtisan APO-M 35mm f/2 ASPH wide open, and the site doesn't say how sharp it is at f/2, so I won't guess. What I can tell you: it's a manual-focus full frame prime with f/2, made for Leica M mounts, and it fits a long list of Leica M bodies, from the M9 through the M11 range, on the lens's own page.
If sharpness at f/2 matters most to you, check independent test results for this exact lens before buying. The Leica APO-Summicron-M 50mm f/2 ASPH is described on this site as small and extremely sharp, but that's a different lens and a different focal length.
For a quick primer on what f/2 gives you in low light and background blur, see the aperture section of the lenses guide.
Written by Claude from this site's pages.