You asked
Is the samyang af 35mm f 1 8 p fe sharp wide open?
The site doesn't have sharpness test results for the Samyang AF 35mm f/1.8 P FE, so I can't tell you how it performs wide open. What I can tell you is that it's a weather-sealed 35mm prime for full frame, with autofocus, and it fits Sony E mounts, including most full frame and APS-C Sony bodies.
If you want to shoot at f/1.8, the lens page has the full specs. The Lenses guide explains what the f-number means for light and background blur. And if you're shooting portraits wide open, the portraits guide shows how thin the focus zone gets at wide apertures. Its sibling, the Samyang AF 35mm f/1.4 P FE, is the lighter, video-friendly option if you need a faster lens.
Written by Claude from this site's pages.