imaging equipment 52 the optical information containing information such as the focus value the sensitivity value and the shading is obtained with the computer pc subsequently the own optical information as a measurement result is recorded in the optical information recording unit 24 the recording of the optical information in the optical information recording unit 24 is performed by marking on the case 23 of the lens unit 12 with a laser 53 the optical information is read by an assembly operator a reader or the like therefore when assembling the stereo camera 1 it is possible to read the optical information from the optical information recording unit 24 and appropriately select each of the right and left lens units 12 such that the sensitivity value of combined the lens unit 12 and the image sensor 13 becomes identical in the right and left vehicle mounted cameras 11 and a desired sensitivity value accordingly there is no loss of operation time in comparison with the case of performing an evaluation of the sensitivity after assembly the optical information may be converted into a bar code or the like to be recorded hereinafter an exemplary method for selecting combination of the image sensor.