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Inverse-square law, fall-off
| Light Glossary |
Light from a point source falls-off inversely to the square of the distance. move the light from 10-feet-away to 20-feet-away and you have only 1/4 of the intensity; 40-feet, 1/16 th. reflectors and lenses reduce fall-off; diffusion increases it. tip: to minimize fall-off within a scene, use hard lights as far away as practical.
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Reflectors, английский
Желтые отражатели света автомобильных фар, впаянные в асфальт вдоль разделительной полосы на ряде дорог сша
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18% assumption, middle grey, zone 5, английский
Light meters "expect" subjects and scenes to reflect 18% of the incident light. mostly they do. tip: what you do when they don`t will affect your image in more ways than one. see: gray card and zone system.
One-light, untimed workprint, английский
Less expensive and usually preferable to a timed print in that your carefully underexposed scenes are more likely to stay that way. the best way to appraise your work is to keep the printing lights constant from day to day.
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