A capturing apparatus includes an optical input, a fiber optic face plate arranged at the optical input, an image sensor, and optics for mapping a real image at an optical output of the fiber optic face plate onto the image sensor in a predetermined scale. At least a surface of the protruding portion of the embossed pattern is made of a ferromagnetic material. The low noise amplifier also includes an adjusting unit configured to adjust a time constant for reducing a third order intermodulation distortion of the superposed signal in response to a control signal. In one assembly, the locking pin is rotatable between an unlocked position in which the locking pin is axially removable from the gear and a locked position in which a locking pin is not axially removable when the locking segment engages the gear.