A finder optical system includes an eyepiece optical system with a positive refracting
power. The eyepiece optical system includes an optical unit with a positive refracting
power and a lens unit with a positive refracting power, In the eyepiece optical
system, a refracting surface that is located most distant from an eyepoint of the
eyepiece optical system has a positive refracting power and is configured as an
aspherical surface with a negative refracting power on a periphery thereof.