1. An image sensor having a pixel array, wherein the pixel array comprises: a plurality of image pixels that gather image data; a plurality of phase detection pixels that gather phase information, wherein the phase detection pixels are arranged in pairs that include first and second phase detection pixels with different angular responses, wherein the first and second phase detection pixels are covered by a single microlens, wherein the microlens for each pair of phase detection pixels has a length, a width, and a height, wherein the length is twice as long as the width, wherein the pairs of phase detection pixels and image pixels are arranged in a single row in an interrupted line, and wherein the interrupted line includes a plurality of pairs of phase detection pixels and at least one image pixel interposed between each pair of phase detection pixels; and a color filter array, wherein each phase detection pixel includes a respective color filter element, and wherein the color filter elements of the phase detection pixels are all the same color.