You asked
Is the sony fe 20mm f 1 8 g sharp wide open?
I don't have test results for how sharp the Sony FE 20mm f/1.8 G is wide open, so I can't give you a verdict on that from this site. What the lens page does cover is the spec sheet: it's a 20mm prime with f/1.8 maximum aperture, no stabilisation, and autofocus. It frames as 20mm on full frame and about 30mm equivalent on APS-C. You can see the full list of bodies it fits on the Sony FE 20mm f/1.8 G page.
If you're wondering what f/1.8 means for your shots, the lenses guide explains what the aperture changes, and the portraits guide covers how wide apertures affect background blur and focus.
Written by Claude from this site's pages.