A multifunctional polarizing filter is used for a digital camera, and is produced by advanced optical technology to have a very small thickness and an integral structure in order to prevent a vignetting phenomenon in which the captured image is adversely affected by the frame of the filter. The detector also includes electrical contacts for each of the sections and a common grid between the sections. A second contactor is embedded in electrically insulating material within a second slot formed in the box thread. Upon this detection, a drive stop sequence is initiated to stop providing the drive current a short time after the head reaches the parking position.