1. An extended depth of field imaging method, comprising: illuminating a target with a light of a first quasi-monochromatic wavelength in the infrared range; illuminating the target with a light of a second quasi-monochromatic wavelength different from the first wavelength; receiving light reflected from the target at an electronic imaging location; extending depth of target field within which an image of the illuminated target received is substantially in focus by interposing a collection lens constructed and arranged to accentuate chromatic aberration between the illuminated target and the electronic imaging location and by interposing a wavelength dependent aperture between the collection lens and an imaging sensor for receiving the light reflected from the target.