Assertion: focal ratio | /r/CapableOf | imply higher magnification
Facets:
value: typically
type: DEGREE
value: with a given eyepiece
type: OTHER
value: with a narrower field of view
type: OTHER
Source sentences:
text: A long focal ratio implies higher magnification and narrower field of view with a given eyepiece, which is great for observing the moon and planets and double stars.
text: Like focal length, focal ratio can tell you a lot about a telescope: larger f/numbers imply higher magnification with a given eyepiece and a narrower field of view, smaller f/numbers the opposite.
text: A higher focal ratio typically implies higher magnification, whereas a lower focal ratio—f/7, for example—is better for wider views.