Well, reading through the list of products being impacted by the latest round of increased tariffs, all 194 pages! discloses some interesting items - besides bicycles....
Daystar may be interested to see that mica sheet (used in their solar filters) 25.25.10/ 6814.90.00 are on the list.
Digital cameras - 8525.80.50
Lenses/ Objective lenses/ Prisms/ Mirrors - 9001.90.40/9001.90.50/9001.90.60/ 9002.11.90
and optical filters - 9002.20.80
not sure the magnifiers includes eyepieces - 9013.80.20
but tripods are definitely included (All materials) - 9620.00.00
If these tariffs go ahead I can only see a negative impact on astronomical equipment, with higher prices!!