| 单词 | short-focus lens |
| 释义 | > as lemmasshort-focus lens short focus n. a focal point that is near to the lens; chiefly attributive, esp. in short-focus lens, spec., a photographic lens whose focal length is less than the length of the diagonal of the negative or plate with which it is used. ΘΚΠ the world > physical sensation > sight and vision > optical instruments > lens > [noun] > focal length or point focus1664 focus1666 focal distance1684 focal point1692 burning-point1698 short focusa1830 visual focus1837 society > leisure > the arts > visual arts > photography > camera > parts and accessories of camera > [noun] > lens > types of portrait lens1852 short-focus lens1862 periscope1865 rectilinear1867 pantoscope1868 wide-angle1868 long lens1876 apochromatic1887 anastigmat1890 concentric lens1890 euryscope1890 landscape lens1890 rectigraph1890 symmetrical1890 concentric1893 telelens1893 telephoto1894 monocle1897 stigmat1901 stigmatic1902 Long Tom1910 zoom lens1932 Panavision1955 teleconverter1959 macro lens1961 zoom1969 macro1971 a1830 Encycl. Metrop. (1845) IV. 408 Another..method is to substitute for the sun its image formed in the focus of a convex lens of short focus. 1862 Catal. Internat. Exhib., Brit. II. No. 3122 It forms a portrait lens of short focus. 1862 Internat. Exhib.: Illustr. Catal. Industr. Dept. II. xiv. §3154 The same camera can be used for either short-focus portrait or long-focus landscape lenses. 1882 Encycl. Brit. XIV. 580/2 The sun's image formed by a lens or burning glass of short focus is our best mode of attempting to realize the conception of a luminous point. 1892 Photogr. Ann. II. 307 Back can be moved up to the front for short focus work. 1935 Discovery Jan. 25/1 The picture [sc. the oldest existing photograph] was taken on sensitised paper, probably with a small short-focus camera having a large-aperture lens. 1973 Focal Dict. Photogr. Technol. 559 Short focus lenses of normal angle are used in macrophotography at natural size or larger scales of reproduction. < as lemmas |
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