Open Access
Table 3
Optical specifications of C1 and C2.
| C1 (mm) | C2 (mm) | |
|---|---|---|
| Aperture of O1 | 200 | 200 |
| Focal length of O1 | 2456 | 2488 |
| Distance O1 – LM | 2456 | 2488 |
| Distance LM – O2 | 56.5 | 56.5 |
| Focal length of O2 | 300 | 300 |
| Distance O2 – LS | 341 | 340 |
| Aperture of LS | 22 | 20 |
| Distance LS – O3 | 68 | 68 |
| Focal length of O3 | 486 | 500 |
| Distance O3 – F | 60 | 40 |
| Distance F – O4 | 60 | 40 |
| Focal length of O4 | 200 | 200 |
| Distance O4 – camera | 200 | 195 |
| Focal length of the whole instrument | 1244 | 1133 |
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