制版镜头是光学镜头的一类,原本用于平板制版照相设备上,具有像场平、色彩还原好等特点。一般通过设计利用较长的焦距尽量扩大像场,老式制版镜头多用来摄制印刷用网图,随着彩色印刷的流行,制版镜头用于翻拍平面图以作分色用途。因为印刷用网图和图像翻拍对色散纠正要求很高,而制版用胶片对蓝色波长特别敏感,所以制版镜头多带有Apo功能。主流制 Plate lens is a kind of optical lens, originally used for flat-panel plate-making equipment, with the image field level, color reproduction is good. Generally through the use of longer focal lengths designed to expand the image field, the old plate-making lens used to produce printing network, with the prevalence of color printing, plate making for remake of the floor plan for color separation purposes. Because the printing of the network and image remake on the dispersion correction is very demanding, and plate making film is particularly sensitive to the blue wavelength, so plate lens with more Apo function. Mainstream system