| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical system capable of reproducing a satisfactory image including colors with a simple configuration and especially suitable for making a digital camera high in the number of pixels, low in cost and small in size. SOLUTION: The image pickup device is provided with an electronic image pickup device 3 satisfying the following conditional expression (1) when diagonal length of effective image pickup area is defined as d, a center interval of horizontal pixels is defined as p and having a complementary color filter composed of at least four kinds of color filters, an image pickup optical system 1 having the following spectral characteristics (2), (3) when transmittance of 400 nm is defined as T400, transmittance of 600 nm is defined as T600, transmittance of 700 nm is defined as T700 and guiding a light flux from the side of an object to the electronic image pickup device 3 and a controller 4 for performing a signal processing and an image processing based on output from the electronic image pickup device 3. (1) 1.0×10-4<p/d<6.0×10-4, (2) 8×T700<T600, (3) T400<T600.
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