Assertion: symmetrical eyepiece | /r/CapableOf | use two doublets
Facets:
Source sentences:
text: Your illustration shows a symmetrical eyepiece using two doublets, not the 1860 design of Georg Simon Plössl, which had two non-symmetrical doublets.
text: "Your illustration shows a symmetrical eyepiece using two doublets, not the 1860 design of Georg Simon Plössl, which had two non-symmetrical doublets.