| 单词 | focusing glass |
| 释义 | > as lemmasfocusing glass focusing glass n. (a) a ground glass screen used to view and focus the image produced by a view camera; a focusing screen; (b) a small magnifying glass designed to be placed against the focusing screen of a camera, especially as an aid to focusing the image projected upon the screen (now rare). ΚΠ 1850 List Prices 2 in R. J. Bingham Photogenic Manip.: Pt. I (ed. 7) It consists of a Sliding Mahogany Box..; with ground focusing glass, two dark frames for the sensitive paper, and mounted with a miniscus [sic] lens in brass mount. 1858 T. Sutton Dict. Photogr. Focussing Glass..a magnifier used for the purpose of magnifying the image on the ground glass, and enabling the operator to get it into better focus. 1917 Pop. Sci. Monthly Nov. 774/2 The class of work which calls for this kind of screen requires a focusing glass to examine the image. 1993 O. Hilton Sci. Exam. Questioned Documents (rev. ed.) 363 The final accurate focusing is done with a magnifying focusing glass placed over the clear sections of the ground glass. 2012 K. Stern Photo 1 ii. 41 Field cameras..consist of the camera front onto which a lens is attached, a bellows that allows extension and contraction of the camera, and the camera back that holds the film and the focusing glass. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。