Assertion: telescope's power | /r/HasProperty | equal
Facets:
value: as a rule of thumb
type: MANNER
value: under ideal conditions
type: OTHER
Source sentences:
text: As a rule of thumb, the maximum usable power is equal to 50-60 times the aperture of the telescope (in inches) under ideal conditions.
text: The light-gathering power is equal to the sum of the light-gathering powers of each individual telescope.
text: The light-gathering power is equal to the sum of the light-gathering powers of each individual telescope.