Optical system and optical apparatus including optical system

摘要

At least one exemplary embodiment is directed to an optical system which includes at least one first refractive optical element, which includes a solid material satisfying the following conditional expression (1), and at least one second refractive optical element, which includes a solid material satisfying the following conditional expression (2): -1.33x10^-3xupsilond+6.7x10^-1 -1.63x10^-3xupsilond+6.2x10^-1>thetagF (2) where upsilond and thetagF indicate the Abbe number and the partial dispersion ratio, respectively.