Assertion: telescope's aperture | /r/HasProperty | wide
Facets:
value: with an f/10 focal length
type: OTHER
value: pretty
type: DEGREE
Source sentences:
text: The aperture of 8″ is pretty wide with an f/10 focal length, which, according to few customers, could have been more for better and sharper images, especially during photographing bright stars and nebulas.
text: If the f-stop is low, the aperture is wide and lets more light in--so you need a shorter exposure.