the spectroscopic instrument includes a plurality of first lenses arranged one - dimensionally or two - dimensionally ; an aperture opening provided near a focal plane of each of the plurality of first lenses ; a spectroscopic unit that spectrally distribute the light that has passed through the aperture opening ; and a light receiving unit that receives the light spectrally distributed by the spectroscopic unit . the image producing device includes : the spectroscopic instrument ; an imaging unit that captures an image formed by an imaging optical system ; and an image processing unit that acquires a lighting condition from a result of spectroscopy by the spectroscopic instrument and performs color conversion processing depending on the lighting condition on an image captured by the imaging unit .