Assertion: glass's color | /r/PartOf | the image
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text: The key reason LD, ED, ELD, ULD and SLD glass are important in lens design is because of their ability to reduce levels of chromatic aberration, or color fringing, an optical phenomenon in which the colors that make up the image come into focus at slightly differing planes (similar to the way a prism or rainbow breaks white light into individual color channels) as they strike the surface of your camera’s imaging sensor.