Patent ID: 7339744

Claim:
An electronic imaging apparatus comprising: a zoom optical system including, in order from an object side, a first lens unit with negative power and a second lens unit with positive power, in which lens components having refracting power in the first lens unit are only a single biconcave negative lens element located at a most object-side position and a positive lens component located at a most image-side position; an electronic image sensor placed on an image side of the zoom optical system; and an image processing section electrically processing image data obtained by the electronic image sensor to change a shape thereof, the zoom lens system satisfying the following condition in focusing of a nearly infinite object point: 0.85 <|y 07 /( f w ·tan ω 07w )|<0.97 0.75 <|y 10 /( f w ·tan ω 10w )|<0.93 where f w is a focal length of an entire zoom optical system at a wide-angle position, y 10 is a distance from a center of an effective imaging surface to a point furthest from the center of the electronic image sensor, y 07 is an image height expressed by 0.7y 10 , ω 07w is an angle made by a direction of an object point corresponding to an image point, connecting the center of the effective imaging surface of the electronic image sensor at the wide-angle position and the position of the image height y 07 , with the optical axis, and a lens component is such that only a most object-side surface and a most image-side surface thereof come in contact with air and there is no air spacing between both surfaces, taking a single lens element or a cemented lens component as one unit.