vari-focus lens

• 变焦物镜

vari-focus lens的用法和样例：

例句

1. Which shows that the hybrid refractive-diffractive lens can effectively eliminate the aberrance of a telephoto lens with lower weight and simple structure.
   结果表明，利用折衍混合能有效地校正长焦物镜的像差，极大地降低系统的重量和复杂程度，不失为长焦物镜设计的一条有效途径。