A simple eyepiece consisting of two separate planoconvex lenses, used chiefly in refracting telescopes of long focal length.
More example sentences
- The Ramsden eyepiece is essentially a Huygens eyepiece with the bottom lens element reversed.
- This is a variation on the Huygens eyepiece, and has a two piece achromatised eye lens.
- The binocular or optional trinocular viewing head is equipped with several Huygens eyepieces and can be rotated to any position and secured with a lock screw.