A method is described of capturing an image. The method comprising the steps of: exposing an image sensor to radiation from a first part of the electromagnetic spectrum using a first aperture and to radiation from a second part of the spectrum using a second aperture having a different size than the first aperture; and, forming an image on the basis of first image data generated by the radiation from the first part of the spectrum and second image data generated by radiation from the second part of the spectrum.