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Knowledge Center/ Glossary/ Huygenian Eyepiece

Huygenian Eyepiece

An eyepiece having two plano-convex lenses of the same glass separated by half the sum of their focal lengths. This eyepiece is free of lateral chromatic aberration, but is not suitable for use with reticles. 

See also Kellner Eyepiece , Periplan Eyepiece , Wide-Field Eyepiece

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