Abstract: A stereoscopic optical system includes two optical systems arranged in parallel. Optical images corresponding to the two optical systems are formed on different areas in a single image sensor. Each of the two optical systems includes a plurality of lens units. A distance between adjacent lens units changes when a focal length changes in each of the two optical systems. One of the plurality of lens units is a movable lens unit. A predetermined inequality is satisfied.

Abstract: A stereoscopic optical system includes two optical systems arranged in parallel. Each of the two optical systems includes, in order from an object side to an image side, a front group, an aperture stop, and a rear group. Predetermined inequalities are satisfied.

Abstract: An optical system includes a first optical system configured to form an optical image of an object in a first imaging area, and a second optical system disposed in parallel with the first optical system and configured to form an optical image of the object in a second imaging area. Each of the first optical system and the second optical system includes an aperture stop fixed in an optical axis direction relative to a position of an image plane, and a lens unit disposed on an image plane side of the aperture stop and movable in the optical axis direction. A predetermined inequality is satisfied.

Abstract: A lens apparatus includes an optical system including a front lens group having a positive refractive power and configured to move to an object side during focusing from infinity to a close-distance object, and a rear lens group arranged on an image side of the front lens group and configured to be immovable during focusing, a motor configured to move the front lens group, and a holding member including a flange portion, on the object side, extending in a direction orthogonal to an optical axis of the optical system and configured to hold at least part of the rear lens group, wherein the motor includes a coil, a casing housing the coil, and a shaft portion extending from the casing in an optical-axis direction of the optical system, and arranged at a position at which an end surface on the image side of the casing is on the object side with respect to the flange portion in the optical-axis direction.

Abstract: A package is formed of a die cut paperboard that includes a cutout that is covered by a polymer sheet. The sheet holds an item, such as by stretching, against the bottom side of the unpadded paperboard, which is chosen according to its ability to be transported on metal roller conveyors.

Abstract: A lens apparatus detachably attachable to an image capturing apparatus including a focus detection unit having a focus detection optical system and performing focus detection process, and a controller controlling driving of a focusing lens unit based on a result of the focus detection process, via an extender including an extender optical system, includes an image capturing optical system including the focusing lens unit, and a determination unit determining a first correction value used for correcting the result of the focus detection process. When the lens apparatus is attached to the image capturing apparatus via the extender, the determination unit determines the first correction value using first information regarding a diameter of a pupil of the focus detection optical system and second information regarding a diameter of a pupil of an optical system including the image capturing optical system and the extender optical system.

Abstract: A lens apparatus includes an optical system including a front lens group having a positive refractive power and configured to move to an object side during focusing from infinity to a close-distance object, and a rear lens group arranged on an image side of the front lens group and configured to be immovable during focusing, a motor configured to move the front lens group, and a holding member including a flange portion, on the object side, extending in a direction orthogonal to an optical axis of the optical system and configured to hold at least part of the rear lens group, wherein the motor includes a coil, a casing housing the coil, and a shaft portion extending from the casing in an optical-axis direction of the optical system, and arranged at a position at which an end surface on the image side of the casing is on the object side with respect to the flange portion in the optical-axis direction.

Abstract: A package is formed of a die cut paperboard that includes a cutout that is covered by a polymer sheet. The sheet holds an item, such as by stretching, against the bottom side of the unpadded paperboard, which is chosen according to its ability to be transported on metal roller conveyors.

Abstract: A lens apparatus detachably attachable to an image capturing apparatus including a focus detection unit having a focus detection optical system and performing focus detection process, and a controller controlling driving of a focusing lens unit based on a result of the focus detection process, via an extender including an extender optical system, includes an image capturing optical system including the focusing lens unit, and a determination unit determining a first correction value used for correcting the result of the focus detection process. When the lens apparatus is attached to the image capturing apparatus via the extender, the determination unit determines the first correction value using first information regarding a diameter of a pupil of the focus detection optical system and second information regarding a diameter of a pupil of an optical system including the image capturing optical system and the extender optical system.

Abstract: The interchangeable lens apparatus provided with an image capturing optical system and being detachably attachable to an image capturing apparatus, the image capturing apparatus being configured to detect a defocus amount of the image capturing optical system by using a signal acquired by photoelectric conversion of an optical image formed by the image capturing optical system. The interchangeable lens apparatus includes a focus lens included in the image capturing optical system, and a memory to store information on a focus sensitivity indicating a relation between a unit movement amount of the focus lens and a displacement amount of the optical image. The information on the focus sensitivity is information for enabling acquiring the focus sensitivity different depending on an image height.

Abstract: The image pickup apparatus includes a focus detector to produce, by using a light from an object passing through an image-taking optical system, focus information indicating a focus state of the image-taking optical system, a light-receiving sensor including visible-light receiving elements each receiving the light from the object and respectively having sensitivity centroids in mutually different wavelength ranges of a visible wavelength range, and a controller. The light-receiving sensor includes, separately from the visible-light receiving elements, infrared receiving elements each having a sensitivity centroid in an infrared wavelength range. An infrared-cutting filter disposed on a light-entering side further than the light-receiving sensor has a half-value wavelength longer than a wavelength of the sensitivity centroid of the infrared receiving elements.

Abstract: The interchangeable lens apparatus provided with an image capturing optical system and being detachably attachable to an image capturing apparatus, the image capturing apparatus being configured to detect a defocus amount of the image capturing optical system by using a signal acquired by photoelectric conversion of an optical image formed by the image capturing optical system. The interchangeable lens apparatus includes a focus lens included in the image capturing optical system, and a memory to store information on a focus sensitivity indicating a relation between a unit movement amount of the focus lens and a displacement amount of the optical image. The information on the focus sensitivity is information for enabling acquiring the focus sensitivity different depending on an image height.

Abstract: A finder optical system includes an erecting optical system, an eyepiece optical system, and a light metering optical system. An optical axis of the light metering optical system is non-parallel to an optical axis of the eyepiece optical system. The light metering optical system includes a first lens having positive refractive power and a second lens having negative refractive power in this order from a side of the erecting optical system to a side of an image sensor, and the second lens is a prism body reflecting a light flux incoming from an incident surface off an inner reflection surface and outputting the light flux from a light outputting surface.

Abstract: The image pickup apparatus includes a focus detector to produce, by using a light from an object passing through an image-taking optical system, focus information indicating a focus state of the image-taking optical system, a light-receiving sensor including visible-light receiving elements each receiving the light from the object and respectively having sensitivity centroids in mutually different wavelength ranges of a visible wavelength range, and a controller. The light-receiving sensor includes, separately from the visible-light receiving elements, infrared receiving elements each having a sensitivity centroid in an infrared wavelength range. An infrared-cutting filter disposed on a light-entering side further than the light-receiving sensor has a half-value wavelength longer than a wavelength of the sensitivity centroid of the infrared receiving elements.

Abstract: A finder optical system includes an erecting optical system, an eyepiece optical system, and a light metering optical system. An optical axis of the light metering optical system is non-parallel to an optical axis of the eyepiece optical system. The light metering optical system includes a first lens having positive refractive power and a second lens having negative refractive power in this order from a side of the erecting optical system to a side of an image sensor, and the second lens is a prism body reflecting a light flux incoming from an incident surface off an inner reflection surface and outputting the light flux from a light outputting surface.

Abstract: The image processing apparatus performs image processing on an input image produced by image pickup of a scene through an optical system, the scene including plural objects whose object distances are mutually different. The apparatus includes a filter acquisition part acquiring a chromatic aberration correction filter for an out-of-focus area in the input image and an image restoration filter, and a processing part performing chromatic aberration correction processing using the chromatic aberration correction filter and image restoration processing using the image restoration filter on the input image. The filter acquisition part acquires the chromatic aberration correction filter by using information on chromatic aberration of the optical system, information on an in-focus distance of the optical system in the image pickup of the scene, and information on the distances to the respective objects.

Abstract: The image processing apparatus performs image processing on an input image produced by image pickup of a scene through an optical system, the scene including plural objects whose object distances are mutually different. The apparatus includes a filter acquisition part acquiring a chromatic aberration correction filter for an out-of-focus area in the input image and an image restoration filter, and a processing part performing chromatic aberration correction processing using the chromatic aberration correction filter and image restoration processing using the image restoration filter on the input image. The filter acquisition part acquires the chromatic aberration correction filter by using information on chromatic aberration of the optical system, information on an in-focus distance of the optical system in the image pickup of the scene, and information on the distances to the respective objects.