For automated imaging and inspection applications, Navitar Inc. offers the Zoom 6000 lens series. The parfocal optical system of the lenses has a 6.5:1 zoom ratio and a total optical zoom range from 0.09× to 393×, depending on the adapters and attachments used. Working distance can be varied from 34 to 390 mm and the field of view from 0.01 to 125.68 mm. The lenses can be used with C- or F-mount cameras and are available in manual, motorized or detented versions for calibrated repeatability. Illumination options include differential interference contrast, simple polarization and fluorescence techniques.