You asked

Is the voigtl nder ultron vintage line 35mm f 2 aspherical sharp wide open?

I don't have sharpness test results for this lens, so I can't tell you how crisp it is at f/2. What I can tell you is that it's a 35mm f/2 prime for full frame, made for the Leica M mount, with manual focus only. You can check the full lens page for the complete spec list and the Leica M bodies it fits.

f/2 is a wide aperture, so expect shallow depth of field and a softer background. The aperture section of the lenses guide explains what that means in practice, and the portraits guide shows how to keep eyes sharp when you shoot wide open.

Written by Claude from this site's pages.

From these pages