Heading 9002 — Lenses, prisms, mirrors and other optical elements, of any material, mounted, being parts or fittings for instruments or apparatus, other than such elements of glass not optically worked

900211 Lenses; objective, for cameras, projectors or photographic enlargers or reducers, mounted, being parts or fittings for instruments or apparatus, of any material (excluding glass not optically worked)

900219 Lenses; objective, (other than for cameras, projectors or photographic enlargers or reducers), mounted, of any material (excluding elements of glass not optically worked)

900220 Filters; mounted as parts or fittings for instruments or apparatus, of any material (excluding elements of glass not optically worked)

900290 Optical elements; n.e.c. in heading no. 9002 (e.g. prisms and mirrors), mounted, being parts or fittings for instruments or apparatus, of any material (excluding elements of glass not optically worked)