Assertion: telescope's optic | /r/HasProperty | perfect
Facets:
value: essentially
type: DEGREE
value: almost
type: DEGREE
Source sentences:
text: The optics of a telescope must be almost perfect.
text: In fact, you’ll be able to split slightly closer doubles with a telescope with a little less than perfect optics, than you can when your optics are perfect.
text: So, if you have purchased a 3-inch telescope — even if it is blessed with perfect optics — the claim of 500-power is more than three times the limit of the most practical magnification that it can provide.
text: Hubble’s optics are now essentially perfect, and the telescope is above the Earth’s atmosphere, so this gives an accurate value for the resolution of the image produced by the telescope before it is captured by one of the telescope’s detectors.
text: And that's if the scope has perfect optics and the night air happens to be unusually steady.