microprism
/ˈmaɪkrəʊprɪzəm/adjective
1- of or relating to an area of the focusing screen of some reflex cameras which is covered with a grid of tiny prisms and splits up the image when the subject is not in focus微棱镜的。
1.1
- (of focusing) using such a system（聚焦）使用微棱镜的。