You asked
Is the sony fe pz 16 35mm f 4 g worth it?
Yes, for landscapes and architecture, I think it's worth it. It's the classic wide zoom: 16-35mm on full frame gives you big skies and strong foregrounds. At f/4 it's lighter and usually cheaper than the f/2.8 versions, and you don't need the extra light for landscapes, since you'll mostly shoot at f/8 to f/11 anyway. The catch is that it isn't stabilised, so it's less forgiving in dim light and for handheld shots.
It works on full-frame bodies such as the Sony a7 III, and on APS-C ones such as the Sony a6400, where it frames like 24-52mm. If you shoot mostly at night or indoors, the landscape guide and sensor guide are worth a read first.
Written by Claude from this site's pages.