Abbe-Koenig Prism from Japan
Porro-type prism with air-spaced roof surfaces providing total internal reflection while maintaining high light transmission. Falls under HTS 9001.90.50.00 as unmounted optical prism for high-performance binoculars. Combines image erection with maximum light gathering capability.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Air gap dimension specifications critical for total internal reflection
• Specify roof surface dihedral angle precision for stereoscopic viewing
• Enhanced aluminum coatings required for high light transmission claims