You asked
Is the zeiss batis 18mm f 2 8 good for vlogging?
The Zeiss Batis 18mm f/2.8 can work well for vlogging, but mainly on a full-frame Sony E body. On full frame it gives a true 18mm view, which is in the wide range I like for arm's-length shooting. On APS-C it becomes roughly 27mm, which is too tight, so I'd only use it there if you accept a narrower frame.
Pair it with a full-frame body such as the Sony ZV-E1 or the compact Sony a7C. The lens is autofocus and compact, which suits handheld use, but it isn't stabilised, so check how your body handles shake. Don't spend the whole budget on glass, though: good audio matters more, so read Video before you buy.
Written by Claude from this site's pages.