Assertion: nagler eyepiece | /r/HasProperty | invented by albert nagler
Facets:
value: patented in 1979
type: TEMPORAL
Source sentences:
text: Invented by Albert Nagler and patented in 1979, the Nagler eyepiece is a design optimized for astronomical telescopes to give an ultra-wide field of view (82°) that has good correction for astigmatism and other aberrations.