| 单词 | guide number |
| 释义 | > as lemmasguide number guide number n. Photography (see quot. 1962). ΘΚΠ society > leisure > the arts > visual arts > photography > action of taking photograph > technical factors > [noun] > flash > number or time guide number1948 recycling time1956 1948 A. L. M. Sowerby Dict. Photogr. (ed. 17) 317 at Flash bulbs The figures given are guide-numbers; by dividing these by the distance..between object and flash the stop to be used is given directly. 1959 L. A. Mannheim Successful Flash Photogr. 44 Guide numbers vary with film speed. 1962 M. L. Haselgrove Photographers' Dict. 120 Manufacturers of flash bulbs specify a guide number for each bulb to be used in conjunction with a given shutter speed and given film. This..simplifies the matter of determining what aperture to use to obtain the correct exposure for any given subject at a known distance from the flash bulb. < as lemmas |
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