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positive log. Any number less than 1, but greater than zero, is a negative log. 0.48. necessary for you to memorize logarithms, or refer to the log tables. All scientific calculators have a "log" should become familiar with the functions of your calculator before proceeding with the study of on using logarithms, refer to the chapter on logarithms in Mathematics, Volume 1, NAVEDTRA 10069. used to indicate exposure in characteristic curves and reduce them to a manageable form. For example, the exposure time of 1/100 second and provides an illuminance of 80,000 lux (or meter-candles). The log exposure can be calculated easily as follows: characteristic curve indicates how exposure and processing differences affect photographic emulsions by comparing density and the log of exposure. a starting point, you should become familiar with the terms transmission, opacity, and density, or T, O, and D. it. Transmission is a measure of the light-passing ability of a film or other medium. The transmission of a processed film refers to the fraction, or percentage, of incident light that passes through the film. transmission is as follows: incident (or falling) to a film and 5 mc is passing through it, the transmission is as follows: T = 5/10 or T = 0.50, or 50 percent. When 2 mc is transmitted, the formula reads T = 2/10 or 0.20, or T = 20 percent. Advanced Photography Course |
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