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| Newtonian focus | |||
| focal point | |||
| image focus | |||
| primary narrowing | |||
| prime focus (телескопа); principal focus (телескопа) | |||
| prime focus | |||
| focus | |||
| principal focus | |||
| principal focus (point) | |||
| principal focus (параллельных лучей) | |||
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| focuses | |||
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главный фокус : 15 do fraz, 6 tematyki |
| Astronomia | 3 |
| Geofizyka | 3 |
| Kartografia | 1 |
| Motoryzacja | 1 |
| Nanotechnologia | 2 |
| Publikatory środki masowego przekazu | 5 |