【発明の名称】固定焦点距離レンズ

Japanese Patent JP3069437

B2

A fixed-focal-length lens system includes first and second lens groups arranged in order from front to rear. The first lens group consists of a plurality of lenses and has a negative refracting power and the second lens group consists of a plurality of lenses and has a positive refracting power. The fixed-focal-length lens system satisfies the following conditions 0.58<|f1/f|<0.95 (1) 0.50<|f1/f2|<1.0 (2) 1.6