An optical device for capturing an image of a scene, the optical device comprising: a plurality of image sensors each operable to capture a respective initial image of the scene； a lens arrangement operable to receive light from the scene and to form each initial image on each respective image sensor, each image sensor being located at a different respective distance from the lens arrangement； and an image processor operable to generate the captured image of the scene on the basis of image data from one or more of the captured initial images.
