Patent ID: 8159532

Claim:
An electronic image pickup apparatus comprising: a taking optical system; an image pickup element which is disposed at an image side of the taking optical system, and which converts an image formed by the taking optical system, to an electric signal; and an image restoring section which restores electrically a photographed image according to a difference in occurrence of an aberration by the taking optical system in an air environment photography and in a underwater environment photography; wherein the aberration includes a distortion; wherein the taking optical system is a zoom lens system which satisfies the following conditional expressions 0.50 <Ih/f w <1.50 (A) −40%<DIS<−12% (B) where, f w denotes a focal length at the time of a wide angle end photography of the taking optical system, Ih denotes half of a diagonal length of an effective image pickup area, and DIS denotes an amount of distortion in an image height, the image height being a same amount as Ih, at the wide angle end at the time of in air photography.