Periplan Eyepiece

An eyepiece consisting of one achromatic doublet plus one plano-convex lens (plano side facing the doublet) as the eye lens and a second plano-convex lens (plano side also facing the doublet) as the field lens. Designed for use with Plan and Semi-Plan objectives.

See also Kellner Eyepiece , Huygenian Eyepiece , Wide-Field Eyepiece , Plan Objective , Semi-Plan Objective

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