发明授权
US5555132A Wide-conversion lens and a zoom lens with it 失效
宽转换镜头和变焦镜头

Wide-conversion lens and a zoom lens with it
摘要:
A wide-conversion lens for attachment to a master lens system consists of a bi-negative first lens in a object side and a bi-positive second lens in a master lens side, and in the second lens its radii of curvature of both surfaces are selected the same.
公开/授权文献
信息查询
0/0