Edmund Industrial Optics has introduced a telecentric video lens that features a working distance of 125 to 150 mm, so images are dimensionally accurate over a 25-mm range of focal points. The J54-798 has a constant magnification of 0.5x with a telecentricity of 0.03°. The depth of field is ±3 mm at f/12, and the focus field can be moved over the working distance of the lens. The J54-798 is designed to be used with camera systems that feature 1/2- to 2/3-in. CCDs and has a standard C-mount configuration.