They have a parallel beam path on the object side and therefore depict objects without perspective distortions. Color-optimized for blue light, the bright lenses are very well suited for working with white LED light, because this light is generated by combining blue light-emitting diodes with a yellow phosphor layer. In addition, the low-distortion lenses are characterized by high resolution, low lateral chromatic aberrations and minimal telecentric deviations. Thanks to improved mechanics, the aperture can be set and locked precisely from F6 to F22.