54 also mounted on the bracket 88 is a slider structure 90 the slider structure has mounted thereon the two lenses 84 86 and is slidable along axis 92 in a direction transverse to the orientation of the rods between two home positions one home position is shown in fig1 and is the position orienting lens 84 in the optical path between the target and the sensor 80 this lens 84 is the low resolution lens and will scan the full width of the target page and image it onto the full width of the sensor array the second home position is shown in fig1 and is the position orienting lens 86 in the optical path between the target and the sensor the lens 86 is the high resolution lens and will scan a portion of the width of the target page and image it onto the full width of the sensor 80 the smaller the portion of the target width scanned the higher the resolution if half the target width is scanned the resolution will be double the normal resolution an exemplary embodiment of the sensor 80 is a 5300 pixel ccd array which can provide 600 pixel per inch ppi scan resolution when used with a lens 84 having an optical power for providing a full target page width image onto the sensor the lens 86 images less than the full page width onto the ccd array.