1. A camera system comprising: an iris camera having an optical axis, the iris camera configured to acquire iris images suitable for human identification; a focus camera having an optical axis, wherein the optical axis of the focus camera is angularly offset from the optical axis of the iris camera; an autofocus lens for receiving incoming light and for providing the incoming light to both the iris camera and the focus camera, wherein an output of the focus camera is used in auto-focusing the autofocus lens; a beam splitter arranged downstream of the autofocus lens, the beam splitter directing a first wavelength or range of wavelengths of the incoming light to the focus camera and a second wavelength or range of wavelengths of the incoming light to the iris camera; and a controller coupled to the iris camera and the autofocus lens, the controller configured to correct a focus setting of the autofocus lens to provide a focused image in the second wavelength or range of wavelengths to the iris camera after the output of the focus camera has been used to auto-focus the autofocus lens using the first wavelength or range of wavelengths of the incoming light, the controller further configured to activate the iris camera to capture an iris image of a subject that is suitable for human identification after the focus setting of the autofocus lens has been corrected.