You asked
Is the viltrox af 50mm f 2 air sharp wide open?
I don't have any test results or sharpness measurements for the Viltrox AF 50mm f/2 Air, so I can't tell you how sharp it is wide open. What I can give you is the basics: it's a 50mm prime with autofocus, it fits Sony E, Nikon Z and L-Mount, and it's made for full frame. It frames as 50mm on full frame and like 75mm on APS-C. You can check the full specs on its lens page.
For what f/2 means in practice, see the aperture guide. If you shoot portraits, the portrait guide explains how wide apertures affect focus and background blur.
Written by Claude from this site's pages.