Scope of microelectronics, large area such as SMT observationSeries variable times larger than the lens (at first)Widely used: machine vision, microelectronics, SMT and other large observation Changing times: 15:1Optical multiples: 0.26 X - 45 XSide view: 2.4 mm - 70 mmWorking distance: 55 mm - 700 mmInterface size: C28 mm