Finder optical system and imaging apparatus comprising the same

A finder optical system, in which a primary image is formed by an objective lens on a primary image formation face and is passed via a relay optical system to form a secondary image on a secondary image formation face, the secondary image being observed via an ocular lens system, the finder optical system comprising:

• a condenser lens having positive power arranged in the vicinity of the primary image formation face;
• and
• a focus plate arranged at a position of the secondary image formation face, wherein
• the relay optical system comprises a relay lens group having positive power and including a plurality of lenses, and is arranged between the condenser lens and the secondary image formation face.