Assertion: eyepiece's field | /r/HasProperty | expensive
Facets:
value: very
type: DEGREE
Source sentences:
text: These wide angled apparent field of view eyepieces are often in 2" format and can be very expensive especially the ones with an ultra-wide field of view.
text: But at the same magnification, different eyepiece types have dramatically different fields of view -- expensive modern designs, like Naglers, may have twice as wide a field as such old standbys as Kellners and Orthoscopics.