Assertion: newtonian telescope's design | /r/CapableOf | range to 4-element multi group lenses
Facets:
Source sentences:
text: Designs range from a standard air-spaced doublet (two lenses in a row) to exotic designs such as oil-spaced triplets and 4-element multi group lenses.
text: Designs range from a standard air-spaced doublet (two lenses in a row) to exotic designs such as oil-spaced triplets and 4-element multi group lenses.