You asked
Is the 7artisans 10mm f 3 5 weather sealed?
The site doesn't say whether the 7Artisans 10mm f/3.5 is weather sealed, so I won't guess. What the page does list is that it's a manual-focus prime for APS-C, with no stabilisation, and that it frames like 15mm on APS-C bodies. It fits Sony E, Fujifilm X, Nikon Z and Micro Four Thirds mounts.
If you shoot in wind, spray or drizzle, weather sealing matters. My landscape guide explains why, and it's worth checking the maker's own specifications before you head out in bad weather. The travel guide makes the same point more lightly: useful if you shoot in rain, sand or snow, but not essential.
Written by Claude from this site's pages.