MC3-03X is a multi-configuration macro lens suitable for the inspection of object sizes ranging from few millimeters to some centimeters. Magnification and focus can be tuned by adjusting a lockable rotating knob. The lens magnification range can be selected by means of a set of extension tubes, included in the product package; this feature makes this component ideal for prototyping purposes and machine vision applications requiring flexibility. Since the working F/# increases with the magnification, the optimum combination of field depth, image resolution and brightness is maintained in any lens configuration. Moreover, the optical distortion approaches zero at any magnification making this lens perfectly suitable for measurement applications.