Edmund Optics‘ E-Series fixed focal length lenses offer a cost-effective solution for fixed focal length imaging without sacrificing performance. The lenses are designed for a maximum sensor format of 2/3″ and have an aperture range of f/4 to f/16. The lenses have no mechanical focus, feature mechanical aperture adjustment, and are available in three focal lengths: 16, 25, and 35mm, all with a working distance of 250mm.