You asked
Is the laowa 19mm f 2 8 zero d gfx hard to focus manually?
Yes, it's manual focus only. The Laowa 19mm f/2.8 Zero-D GFX has no autofocus, so you turn the focus ring yourself every time. I don't have a note on how the ring feels in use, so I won't guess at that.
A 19mm lens is wide, and wide lenses are generally easier to focus by hand than long ones. At f/2.8 the depth of field is also fairly forgiving. For fast work, you can use zone focusing: set a fixed distance and let the sharp zone cover your subject. The Street guide explains the method.
For the lens itself, see the Laowa 19mm f/2.8 Zero-D GFX page.
Written by Claude from this site's pages.