An image sensor comprising: a pixel array comprising first pixels, second pixels, and third pixels arranged in a first pixel row comprising a plurality of the first pixels and a plurality of the second pixels alternately arranged and a second pixel row comprising a plurality of the second pixels and a plurality of the third pixels alternately arranged; a color separation element facing each of the plurality of second pixels and configured to direct light in a second wavelength band toward one of the plurality of second pixels; and a color filter layer between the color separation element and the pixel array and comprising a first color filter corresponding to each of the plurality of first pixels, a second color filter corresponding to each of the plurality of second pixels, and a third color filter corresponding to each of the plurality of third pixels; wherein the first color filter is configured to transmit light in a first wavelength band, the second color filter is configured to transmit light in an entirety of the second wavelength band, light in a part of the first wavelength band, less than an entirety of the first wavelength band, and light in a part of a third wavelength band, less than an entirety of the third wavelength band, and the third color filter is configured to transmit light in the third wavelength band wherein the second wavelength band is between the first and the third wavelength band; the color separation element is configured to direct light in the first wavelength band and light in the third wavelength band toward one of the plurality of first pixels or one of the plurality of third pixels; characterized in that a pass band of the second color filter is larger than a pass band of the first color filter and larger than a pass band of the third color filter such that an average crosstalk among a first channel corresponding to the first wavelength band, a second channel corresponding to the second wavelength band, and a third channel corresponding to the third wavelength band, is from 17% to 25%. a pixel array comprising first pixels, second pixels, and third pixels arranged in a first pixel row comprising a plurality of the first pixels and a plurality of the second pixels alternately arranged and a second pixel row comprising a plurality of the second pixels and a plurality of the third pixels alternately arranged; a color separation element facing each of the plurality of second pixels and configured to direct light in a second wavelength band toward one of the plurality of second pixels; and a color filter layer between the color separation element and the pixel array and comprising a first color filter corresponding to each of the plurality of first pixels, a second color filter corresponding to each of the plurality of second pixels, and a third color filter corresponding to each of the plurality of third pixels; wherein the first color filter is configured to transmit light in a first wavelength band, the second color filter is configured to transmit light in an entirety of the second wavelength band, light in a part of the first wavelength band, less than an entirety of the first wavelength band, and light in a part of a third wavelength band, less than an entirety of the third wavelength band, and the third color filter is configured to transmit light in the third wavelength band wherein the second wavelength band is between the first and the third wavelength band; the color separation element is configured to direct light in the first wavelength band and light in the third wavelength band toward one of the plurality of first pixels or one of the plurality of third pixels; characterized in that a pass band of the second color filter is larger than a pass band of the first color filter and larger than a pass band of the third color filter such that an average crosstalk among a first channel corresponding to the first wavelength band, a second channel corresponding to the second wavelength band, and a third channel corresponding to the third wavelength band, is from 17% to 25%.