| 单词 | filter factor |
| 释义 | > as lemmasfilter factor d. Photography. In full filter factor. A numerical measure of the darkness or density of an optical filter, equal to the ratio of the exposure required with it in place to that required when it is not in place. ΘΚΠ society > leisure > the arts > visual arts > photography > action of taking photograph > technical factors > [noun] > filter factor or scale of exposure exposure1839 time exposure1870 inertiac1886 latitude1889 factor1900 filter factor1904 inertia point1907 intermittency effect1907 Scheiner number1911 scale1920 1900 Photo-miniature Mar. 494 After the negatives are dry make a set of proofs. The one which shows a properly exposed foreground indicates the proper factor for the screen, that is, the number by which the normal exposure is to be multiplied in order to get its equivalent exposure with the screen in place. 1931 Movie Makers Feb. 67/2 (advt.) If you are using a filter, move the filter factor ring and the new lens stop is read instantly. 1991 Photo Answers July 66/1 A filter that has a x2 filter factor needs twice as much exposure—one stop. 2002 G. Rand & D. Litschel Black & White Photogr. ix. 184/2 If the photographer is using a TTL meter system, the filter factor is taken care of because the light reading is made through the filter. filter factor filter factor n. Photography a numerical measure of the darkness or density of an optical filter, equal to the ratio of the exposure required with it in place to that required when it is not in place; = factor n. 6d. ΘΚΠ society > leisure > the arts > visual arts > photography > action of taking photograph > technical factors > [noun] > filter factor or scale of exposure exposure1839 time exposure1870 inertiac1886 latitude1889 factor1900 filter factor1904 inertia point1907 intermittency effect1907 Scheiner number1911 scale1920 1904 C. H. Hewitt Pract. Professional Photogr. II. xii. 82 We need only multiply our exposure by the light filter factor. 1958 Newnes Compl. Amateur Photogr. vii. 98 Filters reduce the light transmitted to form the image and require a compensating exposure increase; with certain very pale filters..this filter factor is..small enough to be ignored. 2002 G. Rand & D. Litschel Black & White Photogr. (ed. 2) ix. 184/2 The filter factor is taken care of because the light reading is made through the filter. < as lemmas |
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