The Tamron 13VG20100AS-SQ is a 5x zoom lens with DC auto iris and manual zoom and focus. It is designed for security and robotics cameras with 1/3-inch CCD. It has a variable focal range from 20mm to 100mm with a maximum aperture of f/1.6. The manual setting rings for can be locked into place so industrial vibrations don't change your settings.
13VG20100AS-SQ 20-100mm f/1.6 Varifocal Industrial Lens with DC Auto Iris, Manual Focus and Zoom, for CS-Mount 1/3-Inch CCD
Auto Iris Cable with 4-Pin Square Connector
2 Years Parts and Labor Warranty