Finder optical device

摘要: A secondary image forming type finder opitcal device having an objective lens solely used therefor, comprising, from front to rear, unit including at least one positive lens, a relay formed by arranging of refractive power and negative in spaced relation, field consisting whose surface is strong curvature, eyepiece two lenses confronting surfaces are satisfying the following conditions: ##EQU1## where f P focal length unit, ν Abbe number its material, R radius curvature which faces relays N unit.