1. A solid-state image sensor that executes photoelectric conversion for a subject image formed through an optical system, comprising: a plurality of pixels disposed in a two-dimensional pattern and each equipped with a photoelectric conversion unit that generates and stores an electrical charge corresponding to incident light, wherein: the plurality of pixels are each one of a first pixel and a second pixel, the first pixel outputting a signal obtained through photoelectric conversion executed on a light flux received from an area of an exit pupil of the optical system, which is substantially not offset from a center of the exit pupil, and the second pixel outputting a signal obtained through photoelectric conversion executed on a light flux selectively received from an area of the exit pupil of the optical system, which is substantially offset from the center of the exit pupil; the plurality of pixels are divided into a plurality of pixel blocks set in a two-dimensional pattern; the pixel blocks each include m×n pixels disposed in a two-dimensional pattern with m pixels and n pixels among the plurality of pixels set respectively along a columnar direction and along a row direction, assuming that m and n each represent an integer equal or greater that 2; at least one of the pixels in each pixel block is the first pixel; color filters assuming a single color are disposed at first pixels belonging to a common pixel block; and at least one pixel among the m×n pixels in at least one pixel block among the plurality of pixel blocks is the second pixel.