CAMERA SYSTEM AND METHOD FOR CORRECTING FOCUS DETECTION PIXEL

摘要

A camera system includes an interchangeable lens and a camera main body. The interchangeable lens includes a lens side storage unit that stores pupil related data according to an image height. The camera main body includes an image sensor including focus detection pixels, a main body side storage unit that stores correction data, and a correction unit corrects non-uniformity in illumination distribution of outputs of the focus detection pixels. The pupil related data is data regarding an F-number and an exit pupil position. The data regarding the F-number indicates a range of luminous flux to be applied to the focus detection pixels at a predetermined image height. The data regarding the exit pupil position relates to a position of intersection of a center of luminous flux applied to the focus detection pixels at a predetermined image height and an optical axis of the imaging optical system.

主权项

1. A camera system comprising an interchangeable lens including an imaging optical system including a focus lens, and a camera main body to which the interchangeable lens is detachably attached,
wherein the interchangeable lens comprises a lens side storage unit that stores pupil related data according to an image height, wherein the camera main body comprises: an image sensor including a plurality of imaging pixels for imaging, and a plurality of focus detection pixels for focus detection; a main body side storage unit that stores correction data for correcting non-uniformity in illumination distribution by incident light to the focus detection pixels based on outputs of the focus detection pixels; and a correction unit that receives the pupil related data from the lens side storage unit, and corrects non-uniformity in illumination distribution of outputs of the focus detection pixels based on the correction data and the pupil related data, wherein the pupil related data is data regarding an F-number of the interchangeable lens and data regarding an exit pupil position of the interchangeable lens, wherein the data regarding the F-number of the interchangeable lens indicates a range of luminous flux to be applied to the focus detection pixels at a predetermined image height, and wherein the data regarding the exit pupil position of the interchangeable lens relates to a position of intersection of a center of luminous flux applied to the focus detection pixels at a predetermined image height and an optical axis of the imaging optical system.