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| Mirror | Focusing guide | Fine-focusing mirror |
|---|---|---|
| Focal length | 4500 mm | 2150 mm |
| Mirror length | 1300 mm | 300 mm |
| Axis length ratio | 1000:6.8 | 1000:8.0 |
| Critical angle | m = 2.5 | m = 3 |
| Cut-off wavelength | 0.18 nm | 0.18 nm |
