Image capturing apparatus

An image capturing apparatus comprising:

• a photoelectric conversion unit including a first pixel group which includes first pixels and a second pixel group which includes second pixels, wherein the first pixels photoelectrically convert an object image formed via a first exit pupil region of a photographing lens and the second pixels photoelectrically convert an object image formed via a second exit pupil region different from the first exit pupil region;
• a focus detection unit for detecting a focus of the photographing lens using a first image signal obtained from the first pixel group and a second image signal obtained from the second pixel group;
• a calculation unit for calculating an inclination of a straight line connecting a barycenter of the first exit pupil region and a barycenter of the second exit pupil region from a pixel arrangement direction of the first pixel group and second pixel group;
• and
• a focus detection range setting unit for setting a focus detection range based on a calculation result of said calculation unit.