可变焦聚透镜
lens of variable focal length
可变焦距物镜
objective with variable focal length
variable focus objective
variable focal length objective
可变焦距透镜
zoom lens
vari-focal lens
variable focal length lens
variable focus lens vari-focus lens
variable focus zoom lens
vari-focus lens variable focus lens
Zoomar lens
可变焦距莫阿带片
varifocal Moire zone plate