| 11. | For further information on simple optical telescopes, see Refracting telescope ?Refracting telescope designs.
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| 12. | For further information on simple optical telescopes, see Refracting telescope ?Refracting telescope designs.
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| 13. | This was especially true in refracting telescopes, before the invention of achromatic objective lenses.
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| 14. | From these experiments Newton concluded that no improvement could be made in the refracting telescope.
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| 15. | Hadley also developed ways to make precision aspheric and aerial refracting telescopes of the day.
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| 16. | -- Light-refracting or bright objects, such as mirrors, lights and crystals.
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| 17. | For reasons that may be endemic to photography, this show is like a refracting lens.
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| 18. | Hadley had solved many of the problems of making a aerial refracting telescopes of the day.
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| 19. | The earliest known working telescopes were the refracting telescopes that appeared in the Netherlands in 1608.
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| 20. | Worcester Warner would design the 36-inch refracting telescope installed at Lick Observatory in 1888.
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