images from its construction (click for larger size)
| Preparing aluminium sheets | milling | ALT bearing sheets |
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| rounding ALT bearings | mirror box structure | upper trusses milling |
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| secondary holder milling | secondary holder | upper estructure |
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| spider and secondary holder | ground base and mirror box | Azimut bearings |
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| Azimut transmission | Azimut worm gear | secondary mirror |
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| ALT transmission cluth off | ALT transmission cluth on | Azimut ring |
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| Cutting ALT gears |
mirror final polishing | Foucault testing |
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| Mirror 54 point floating cell | first test mounting | final mounting |
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| ALT transmission | filter holder | observer's baffle |
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