| 单词 | flatness of field |
| 释义 | > as lemmasflatness of field b. flatness of field (see quots. and flat field n. at flat adj., adv., and n.3 Compounds 2). ΘΚΠ society > leisure > the arts > visual arts > photography > action of taking photograph > technical factors > [noun] > type of focusing depth of field1855 circle of least confusion1867 flatness of field1867 infinity1867 register1890 fixed focus1892 back focus1897 circle of confusion1906 isocentre1931 split-field1941 split-image1950 1867 J. Hogg Microscope (ed. 6) i. ii. 72 Flatness of field..denotes the exact capability of an objective to show the peripheral or marginal portions of the field with the same sharpness as the central. 1878 W. de W. Abney Treat. Photogr. 206 On the distance of the diaphragm from the lens is dependent the amount of distortion, as is also the size of the picture which the lens is capable of defining; whilst at the same time the flatness of the field is also in a great measure due to a large distance being maintained between them. 1884 Encycl. Brit. XVII. 805/2 To get tolerable definition and flatness of field a stop must be added. 1919 Brit. Jrnl. Photogr. Almanac 238 Flatness of field means the property of giving equal definition in all parts of the plate when photographing a flat subject with the lens pointed squarely to it. < as lemmas |
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