Canon Kabushiki Kaisha

Arata Sato

Ken Wada

Koshi Hatakeyama

Hiroyuki Hamano

Takayoshi Yokoyama

The image processing apparatus includes a memory configured to store information on a specific image pickup condition under which a specific blur component is generated in an input image produced by image capturing using an optical system, the specific blur component being caused by the optical system;

Image processing apparatus, image pickup apparatus, non-transitory storage medium storing image processing program and image processing method

The optical system capable of performing zooming includes a first lens unit and a second lens unit and satisfies conditions of |(&#x394;TMyu+&#x394;TMyl)/(&#x394;WMyu+&#x394;WMyl)|&#x3c;0.67 and 0.75&#x3c;|(&#x394;WMyu+&#x394;WMyl)|/2P&#x3c;16.0. &#x394;WMyu represents a lateral aberration amount for a d-line of a 70 percent upper ray reaching an 80 percent image height at a wide-angle side middle focal length, &#x394;WMyl represents a lateral aberration amount for the d-line of a 70 percent lower ray reaching the 80 percent image height at the wide-angle side middle focal length, &#x394;TMyu represents a lateral aberration amount for the d-line of the 70 percent upper ray reaching the 80 percent image height at a telephoto side middle focal length, &#x394;TMyl represents a lateral aberration amount for the d-line of the 70 percent lower ray reaching the 80 percent image height at the telephoto side middle focal length, and P represents a pixel pitch of the image sensor.

Optical system and image pickup apparatus

A zoom lens includes, a first lens unit having positive refractive power, a second lens unit having negative refractive power, a third lens unit having positive refractive power, and a fourth lens unit having positive refractive power. All of the lens units are moved during zooming from a wide-angle end to a telephoto end. An aperture stop is arranged on the image side of the third lens unit. A distance T23 from a lens surface closest to the image side in the second lens unit to a lens surface closest to the object side in the third lens unit when the zoom lens is at the telephoto end, a focal length fT of the entire zoom lens at the telephoto end, and focal lengths f1, f2, and f3 of the first, second, and third lens units, respectively, are set based on predetermined mathematical conditions.

Zoom lens and image pickup apparatus equipped with zoom lens

A zoom lens includes, from the object side, a first lens unit having a positive refractive power, a second lens unit having a negative refractive power, and a subsequent lens unit. The first lens unit includes an optical element composed of an anomalous dispersion optical material, a positive lens, and a negative lens. The shape of the negative lens and the ratio of the Abbe number of the positive lens and the Abbe number of the negative lens satisfy predetermined conditions.

Zoom lens

A zoom lens includes a first lens unit having a negative refractive power and which is provided at a location closest to an object side, a lens unit LP having a positive refractive power, which is provided at a location closest to an image side, and which is stationary during zooming, and a lens unit LN having a negative refractive power, which is provided adjacent to the lens unit LP on the object side of the lens unit LP, and which is configured to move during zooming. In the zoom lens, optical parameters fp, fn, fw, ft, fni and &#x3bd;dni are appropriately set.

Zoom lens and image pickup apparatus with zoom lens

An optical system having a larger total lens length than a focal length includes lenses L and NL on at least one of a magnification conjugate side and a reduction conjugate side with respect to an aperture stop. The lens L satisfies conditional expressions as follows,&#x2212;1.68&#xd7;10&#xb7;&#x3bd;+0.590&#x3c;&#x3b8;&#x3c;3.15&#xd7;10&#xb7;&#x3bd;&#x2212;1.86&#xd7;10&#xb7;&#x3bd;+0.878, and5&#x3c;&#x3bd;&#x3c;27,where &#x3bd;and &#x3b8;are an Abbe number and a gF-line partial dispersion ratio of the lens L. The refractive power of the lens L is positive when located at the magnification conjugate side, or negative when located at the reduction conjugate side.

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Utsunomiya, Japan

Arata Sato