Sourcing telescope mirror cells from China
Telescope mirror cells from China carry 4% UK duty under the telescope parts line, with no anti-dumping duty in the supplied tariff record. For consumer sales in Great Britain, general product safety applies. Specify mirror support and retention before ordering. Cambridge China Bridge sources telescope mirror cells.
Duty on telescope mirror cells
Read from the UK Trade Tariff on 1 October 2026, heading 9005 covers optical telescopes, other astronomical instruments, their mountings, parts and accessories. Telescope mirror cells are candidates for 9005 90 00 00, the parts-and-accessories line. The table shows product variants using that same tariff line.
The supplied record gives 4% duty for goods from China, with no anti-dumping or countervailing measures and no suspensions listed. It also attaches a DCMS Export Licence entry. Official guidance states that importing objects of cultural interest into Great Britain has no licensing requirement. Ask your customs broker to confirm how the attached entry affects your declaration.
Confirm the commodity code using the assembly drawing, intended telescope and supplied components. Describe a mirror-support assembly clearly rather than invoicing it simply as a metal bracket. For related parts within the wider heading, see telescope focusers.
| Goods | Commodity code | Duty | Anti-dumping or countervailing duty on China |
|---|---|---|---|
| Telescope primary mirror cells | 9005 90 00 00 | 4% | None |
Mirror support, retention and tube fit
Specify the mirror diameter, thickness and mass, the cell envelope, mounting-hole positions and clearances to the tube. Agree the support-pad layout, edge-support position, pad material and mirror-retaining arrangement. Define whether the order includes the mirror, adjustment screws, springs, locking screws or mounting hardware.
Agree collimation travel, adjustment access and how the setting is retained. Ask for a sample fitted to the intended mirror and tube, then check it through changes in telescope elevation. For consumer sales in Great Britain, general product safety law applies. Include fitting instructions addressing mirror retention and safe handling of the supported glass.
Worked duty example
Illustrative example, not a quote: 50 adjustable telescope mirror cells, illustrative order only under 9005 90 00 00, invoiced at £10,000 free on board, with £900 of freight and insurance to the UK. The customs value is £10,900. Duty at 4% is £436. Import VAT at 20% is charged on the customs value plus duty, £11,336, so it is £2,267.20. Import taxes total £2,703.20; a VAT-registered importer can usually reclaim the VAT, so the lasting cost is the £436 of duty. The import duty and VAT guide explains each step.
Inspection checklist
Fit: compare the cell envelope, mounting holes and mirror clearances with the approved drawing and trial assembly.
Support: check pad positions, free movement of floating supports and edge contact with the intended mirror installed.
Adjustment: operate collimation and locking screws through the agreed travel; check for binding, loose threads and movement after locking.
Finish and packing: check burrs, coating damage, loose hardware and protection of projecting screws; repeat the fit and adjustment checks on arrival.
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What goes wrong
Retaining clips tightened against the mirror can distort the image. Misplaced pads or edge supports can let the mirror shift as the telescope tilts. A cell may fit the nominal mirror diameter yet foul the tube, obstruct adjustment access or leave inadequate clearance around the glass.
Weak springs, rough threads and locking screws that move the cell can make collimation difficult to retain. Approve the assembled sample and record its adjustment behaviour before production. Use an agreed quality inspection brief to check the same features before shipment and on arrival.
Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For components and parts, see sourcing for manufacturers.
Frequently asked questions
What is the UK import duty on telescope mirror cells from China?
The supplied tariff record gives 4% duty under 9005 90 00 00, with no anti-dumping or countervailing measures and no suspensions listed.
What measurements does the mirror-cell factory need?
Provide mirror diameter, thickness and mass, tube clearance, mounting-hole positions, support geometry and adjustment access. State which hardware and optical components are included.
How do I check whether a mirror cell holds collimation?
Fit the intended mirror and tube, adjust and lock the cell, then change telescope elevation. Check for mirror movement, screw backlash and any shift caused by locking.
Should mirror clips clamp the glass tightly?
Agree the retaining clearance and contact arrangement with the telescope designer. Check retention without squeezing the mirror, and confirm that the glass remains secure as the telescope tilts.