1. An optical system comprising: a first camera arranged to have a first field of view, the first camera comprising: a light redirector configured to redirect light; a first lens assembly comprising a first lens and a first actuator for moving the first lens, the first lens assembly being disposed optically downstream of the light redirector; a first image sensor configured to receive light representing the first field of view, the first sensor being disposed optically downstream of both the light redirector and the first lens assembly, the first image sensor comprising a first photosensitive face defining a first reference plane; a second camera arranged to have a second field of view that at least partially overlaps with the first field of view, the second camera comprising: a second lens assembly comprising a second lens and a second actuator for moving the second lens; a second image sensor configured to receive light representing the second field of view, the second sensor being disposed optically downstream of the second lens assembly, the second image sensor comprising a second photosensitive face defining a second reference plane, the first reference plane being different from the second reference plane.