An imaging device and a focusing control method are provided. The imaging device includes: an imaging element, having pixels including phase-difference detecting pixels and imaging a subject through an imaging optical system including a focus lens; and a focusing controller, selectively performing focusing control using a phase difference AF method or focusing control using a contrast AF method in a mode in which focusing control for focusing on a main subject by driving the focus lens is continuously performed multiple times. The focusing controller performs the focusing control using the contrast AF method in a case where a state in which a degree of reliability of the focusing control using the phase difference AF method is equal to or less than a threshold value persists N times (N=2 or more), while the focusing control using the phase difference AF method is continuously performed.

A method and device for autofocusing a macro object by an imaging device is provided. The imaging device includes a lens. In one aspect, the method includes: providing two or more focus perimeters in a viewfinder; obtaining a group of focus values, the group of focus values including at least one focus value associated with each of the two or more focus perimeters, each focus value in the group of focus values including a magnitude and a direction for causing movement of the lens; comparing focus values in the group of focus values to identify a macro object focus value; and in response to identifying the macro object focus value, determining autofocus settings based on the macro object focus value.

According to an aspect of the invention, an imaging apparatus includes: a focus detection unit configured to execute focus detection based on a phase difference between image signals obtained through photoelectric conversion of a light flux passing through different pupil partial regions of an imaging optical system; a first image blur compensation unit configured to compensate for image blur; a second image blur compensation unit configured to compensate for image blur; and a control unit that controls driving of the first image blur compensation unit and the second image blur compensation unit. The control unit controls a driving amount of the first image blur compensation unit and a driving amount of the second image blur compensation unit such that a change in vignetting occurring in the light flux passing through the imaging optical system is equal to or less than a predetermined value during a period in which the focus detection unit executes the focus detection.

A focus detection device includes: a sensor outputting a pair of focus detection signal sequences, each of which being made of a plurality of focus detection signals; a difference calculation unit obtaining a plurality of differences by sequentially calculating differences between focus detection signals corresponding to each other in the pair of focus detection signal sequences; a division unit dividing the pair of focus detection signal sequences into at least two pairs of partial signal sequences based on the plurality of differences; a focus detection parameter calculation unit calculating a first focus detection parameter according to a phase difference amount of a first pair of partial signal sequences and a second focus detection parameter in accordance with a phase difference amount of a second pair of partial signal sequences; and a focus adjustment parameter determination unit determining either the first or second focus detection parameters, as a focus adjustment parameter.

An imaging system has an interchangeable lens and a camera body capable of communicating with the interchangeable lens. A camera control unit of the camera body acquires focus-sensitivity-related information (including sensitivity information at an image height of the center and correction information of the sensitivity that changes depending on the image height) from a lens control unit of the interchangeable lens through communication at a suitable timing. The camera control unit corrects a change of the sensitivity caused by the image height using image height information of a focus detection region selected from a plurality of focus detection regions and the acquired focus sensitivity correction information. The camera control unit calculates a driving amount of the focus lens from the focus detection signal using the corrected focus sensitivity, generates a control signal for instructing the driving amount, and transmits the control signal to a lens control unit.

An image sensing device includes a first pixel including a first light-shielding member and a second pixel including a second light-shielding member, and the first and second pixels perform phase difference detection. The image sensing device further includes a third pixel including a third light-shielding member, and the third pixel performs image sensing. A third opening in the third light-shielding member is disposed in a center of the third pixel. In a predetermined direction, a length of the third opening is smaller than a length of a first opening in the first light-shielding member and a length of a second opening in the second light-shielding member.

Various embodiments of the present technology may comprise a method and apparatus for vignette and out-of-focus correction. The method and apparatus may be configured to reposition an adjustable lens during a series of image captures to direct light to the center and the outer edges and/or corners of the image sensor to focus various areas of an object and/or scene. The method and apparatus may further substitute image data from a first image capture with image data from subsequent image captures.

A focus detection device includes: a sensor outputting a pair of focus detection signal sequences, each of which being made of a plurality of focus detection signals; a difference calculation unit obtaining a plurality of differences by sequentially calculating differences between focus detection signals corresponding to each other in the pair of focus detection signal sequences; a division unit dividing the pair of focus detection signal sequences into at least two pairs of partial signal sequences based on the plurality of differences; a focus detection parameter calculation unit calculating a first focus detection parameter according to a phase difference amount of a first pair of partial signal sequences and a second focus detection parameter in accordance with a phase difference amount of a second pair of partial signal sequences; and a focus adjustment parameter determination unit determining either the first or second focus detection parameters, as a focus adjustment parameter.

An image pickup apparatus is capable of executing automatic focus detection of an imaging optical system, and includes a first acquisition unit configured to acquire aberration information of the imaging optical system, a second acquisition unit configured to acquire object information of an object in a focus detecting area, a calculation unit configured to calculate, based on the aberration information of the imaging optical system and the object information, a correction value used to correct a difference between a focus state of a captured image and a result of the automatic focus detection, caused by the aberration of the imaging optical system, and a correction unit configured to correct the result of the automatic focus detection using the correction value.

A focus detection device includes a field lens, a secondary image forming lens configured to capture a light flux from the field lens and to form a pair of images from light fluxes from different pupil positions, and a photoelectric conversion device including a pixel region including at least one focus detection region pair that detects the pair of images. The photoelectric conversion device includes pixels arranged in the pixel region in a matrix. The photoelectric conversion device includes control lines each supplying control signal to at least a part of pixels on a corresponding row, and output lines each receiving a signal from at least a part of pixels on a corresponding column. At least a pair of the pixels connected to a common control line or a common output line form the at least one focus detection region pair and output signals to be used for focus detection.