The line of SLR lenses from Carl Zeiss for industrial applications has now grown to seven models. Thus, a complete line of lenses is now available which offers the right solution for most standard requirements in industrial applications. The modern optical design of these lenses with fixed focal lengths ensures maximum image quality. Professional industrial applications require reliable, constant settings. Therefore, the ZF lenses are available in a special industrial version. The f-stop and focus settings of the ZF-I lenses can be fixed. For this purpose, the lenses are supplied with five locking screws which enable reliable locking of the adjustments once they have been set. Measuring inaccuracies and errors are thus reduced, and there is no need to waste time checking the settings.