Section 18 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; clocks and watches; musical instruments; parts and accessories thereof 90 Optical, photographic, cinematographic, measuring, checking, precision, medical or surgical instruments and apparatus; parts and accessories thereof 90 02 Lenses, prisms, mirrors and other optical elements, mounted, nes 90 02 19 Other objective lenses Commodity Code Description 90 02 19 00 Other objective lenses