Canon has satisfied the demands of experienced image makers for years through the power, design and quality of 35mm and broadcast TV lenses. Canon's Professional L-Series lenses utilize Fluorite, a material which provides outstanding resolution, contrast, and color reproduction- especially in lightweight, high-magnification lenses. Incorporated into the lens on the GL2, Fluorite delivers the ultimate in clarity and image quality. The Fluorite element inside the lens defeats color aberration -- the effect when the components of light stray from one another within a lens, causing a reduction in sharpness, contrast and color. The Fluorite lens precisely controls components of light providing an excellent balance of these three critical ingredients of picture quality. This is unobtainable with conventional optical glass.