Random triples
| Subject | Object |
|---|---|
| gptkb:Schmidt-Cassegrain_telescope | varies |
| gptkb:Sky-Watcher_180mm_Mak | f/15 |
| gptkb:Schmidt-Cassegrain | varies |
| gptkb:Zeiss_APQ_series | f/5.6 |
| gptkb:William_Herschel's_40-foot_telescope | f/10 |
| gptkb:Maksutov-Cassegrain | f/10 to f/15 |
| gptkb:Schmidt-Cassegrain_Telescope | varies |