Many Canon, Nikon, Pentax lens are weather sealed, from I understand Sony G lens made by Minolta are dusted off Minolta designs and are not WR. Nikon D and G will work with many later film bodies, Canon will work on most film bodies, I think there are expectations but don't recall the details. Pentax WR lens are of a later designs and I don't know if the PZ or MZ-S will work with a lens that does not have an aperture ring on the lens. Sigma WR lens should on SA7 and 9 film bodies.