The lens elements are mounted next to each other, typically cemented together, and shaped so that the chromatic aberration of one is counterbalanced by the chromatic aberration of the other.

• 当冕牌玻璃正透镜的光学倍率不会被燧石玻璃的负透镜抵消时，它们的组合能将不同波长的光一起聚焦在焦长更长的一个焦点上。消色差透镜能让两种不同波长的光（通常是红色和蓝色）聚焦在相同的平面上。