Focusing state determining apparatus

摘要: In a color separation optical system in camera, subject light entering focus-imaging elements, to which path lengths from the taking lens are different, is obtained with dividing face. The focusing state determined focus evaluation values according high frequency components of images captured by elements. Thus, can be quickly simple construction without using wobbling method. green transmitted through blue prism and red prism, divided into reflected beam splitter face, contact face between first second prism. on exits as for determining state, enters element.