The mega-pixel lenses are suitable for sensors with a resolution of 720p or more. Tamron's extensive line-up of fixed-focal lenses are ideal for machine vision, factory automation, and surveillance applications. Ø23.5mm/Ø16.5mm effective diameter (front/rear lens) and 0.15m minimum object distance. 17.17mm (in air) back focus and M30.5 P=0.5 filter size.