| URL | Priority | Change frequency | Last modified (GMT) |
|---|---|---|---|
| https://spectrumtelescope.com/instructions/how-to-measure-a-solar-filter/ | 60% | Weekly | 2019-05-28 14:24 |
| https://spectrumtelescope.com/instructions/thin-film-filter-instruction-sheet/ | 60% | Weekly | 2018-09-11 22:16 |
| https://spectrumtelescope.com/instructions/glass-solar-filter-instruction-sheet/ | 60% | Weekly | 2023-06-11 16:46 |