A pair of overhead mirror portions splits a field of view of an imager into first and second subfields of view. An illuminating assembly is energized to illuminate a target. A first part of the imager is exposed to capture return illumination light from the target passing through a horizontal window of a workstation over the first subfield of view, and a second part of the imager is exposed to capture return illumination light from the target passing through the horizontal window over the second subfield of view.