You asked
What are the alternatives to the laowa 11mm f 4 5 ff rl?
If you want something wider than the 11mm, the Laowa 9mm f/5.6 FF RL is the one to look at. It's a 135-degree rectilinear ultra-wide, and I'd call it the widest lens made for full frame. It's also slower at f/5.6, so expect a darker viewfinder and less background blur.
If you want a narrower view, the Laowa 14mm f/4 FF RL Zero-D is the closer match. It's a full-frame prime, and its f/4 aperture is a little brighter than the 11mm's f/4.5.
Both are full-frame lenses, so they suit a full-frame body best. If you're shooting APS-C, check how the focal length translates on the 11mm's own page before deciding.
Written by Claude from this site's pages.