… Lenses, prisms, mirrors and other optical elements, of any material, mounted, being parts of … or apparatus, other than such elements of glass not optically worked. …
Explanatory notes
… 90.02 ‑ Lenses, prisms, mirrors and other optical elements, of any material, mounted, being parts of … worked. ‑ Objective lenses : 9002.11 ‑ ‑ For cameras, projectors or photographic enlargers or reducers … ( heading 90.13 ). (c) Sets of lenses put up in cases and designed for fitting into special frames for sight …