還有螢石/UD玻璃技術。
例如Canon的16-35 II用了3片: "It features 3 high-precision aspherical lens elements, each of a different type: ground, replica and GMo"
還有螢石/UD玻璃技術。
例如Canon的16-35 II用了3片: "It features 3 high-precision aspherical lens elements, each of a different type: ground, replica and GMo"