Abbe-Koenig Prism from Canada
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 — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, 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