Patent ID: 7453650

Claim:
An electronic imaging apparatus comprising: a zoom optical system including, in order from an object side, a first lens unit with positive power, constructed of a single component with positive power, a second lens unit with negative power, having a single negative lens element located at a most object-side position, both surfaces of which are concave, and a positive lens component located at a most image-side position, an aperture stop, and a plurality of lens units arranged after the aperture stop, wherein the plurality of lens units arranged after the aperture stop comprise, in order from the object side, a third lens unit with positive power and a fourth lens unit with positive power, and in zooming from the wide-angle position to a telephoto position, at least, a spacing between the first lens unit and the second lens unit is widened, a spacing between the second lens unit and the third lens unit is narrowed, and a spacing between the third lens unit and the fourth lens unit is widened; an electronic image sensor located 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 form thereof, wherein the zoom optical system satisfies the following conditions in a situation where a nearly infinite object point is in focus: 0.85<| y 07 /( fw ·tan ω 07w )|<0.95 0.7<| y 10 /( fw ·tan ω 10w )|<0.90 where y 10 is a maximum image height; y 07 is an image height expressed by multiplying the maximum image height by 0.7; fw is a focal length of the zoom optical system in its entirety at a wide-angle position; ω 07w is an angle of a ray of light incident on a first lens surface of the zoom optical system, corresponding to an image point at the image height y 07 at the wide-angle position, to an optical axis; and ω 10w is an angle of a ray of light incident on the first lens surface of the zoom optical system, corresponding to an image point at the image height y 10 at the wide-angle position, to the optical axis.