Telescope Secondary Mirror
An ellipsoidal mirror mounted in a cell for correcting aberrations in Cassegrain reflecting telescopes used in observatories. Falls under HTS 9002.90.40.00 excluding machine telescopes per note 5.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If complete telescope assemblies
Heading 9005 for instruments, but note 5 excludes certain machine telescopes.
If for tank/submarine periscopes
Telescopes for specific apparatus shift per note 5.
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Import Tips & Compliance
• Include focal length and coating specs; verify not for section XVI machinery; use protective packaging for curvature
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