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, me Thereof. 90 05 Binoculars, monoculars, other optical telescopes, and mountings therefor; other astronomical instruments and mountings therefor, but not including instruments for radio-astronomy 90 05 80 - - - Refracting telescopes (monoculars) Commodity Code Description 90 05 80 10 - - - Refracting telescopes (monoculars) 90 05 80 90 - - - Other