| 释义 |
microprism, a. Photogr.|ˈmaɪkrəʊprɪz(ə)m|
[f. micro- + prism.]
Applied to an area of the focusing screen of some reflex cameras which is covered with a grid of tiny prisms and which splits up the image when the subject is not in focus; also applied to such a focusing system.
1966H. Keppler Asahi Pentax Way 319 In using the central microprism grid for focusing, you will find that it snaps images in and out of focus with medium focal length lenses more efficiently than with either wide-angle or extremely long lenses. 1968Newnes Compl. Amat. Photogr. (ed. 3) iv. 67 A new alternative [to a rangefinder] is the use of a ‘microprism’ zone, which gives a dotted effect when the image is out of focus. 1970Amat. Photographer 11 Mar. 4 (Advt.), A very advanced camera offering a 6–1 zoom ratio and microprism focusing. 1973Country Life 20 Sept. 826/1 (Advt.), Microprism focusing means speedy and accurate focusing. |