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Creating the Lighting
Dulling Reflections

Photography (Basic) - Introduction to photography and other graphic techniques
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Figure 6-11.–Using painted light. 302.187 useful  range  between  highlights  and  shadows,  in  which the film can record detail, must be established. This useful  range  depends  completely  on  the  reflectance range  of  the  subject. With most color films, this range between highlights and shadows must be kept within five f/stops. This means a ratio of about 32:1. Any area of the subject (except  specular  highlights)  that  is  outside  of  this  range is reproduced either too light or too dark in the final picture. A reflected light meter can be used to find the relationship between the useful or desired diffused highlight and the darkest desired shadow. A difference of two f/stops is a scene contrast of 4: 1; four stops is a 16:1 contrast. Most black-and-white film can record both highlight and shadow detail when this range is not greater  than  about  six  f/stops. Painted  Light Painted light (fig. 6-11) is one of the best ways to obtain even illumination and soft shadows. With this type  of  lighting,  only  one  light  is  used.  The  light  is moved constantly up and down and around the subject and  its  background.  Painted  light  is  effective  for illuminating subjects made up of many smaller parts that cast shadows onto adjacent parts, such as printed circuits or the inside of a radio. When you are using the painted light technique, the exposure  must  be  increased  by  a  factor  of  3.  To determine  the  painted  light  exposure,  hold  the  light stationary at the same distance it will be used from the subject. Read the exposure with your light meter. Multiply the exposure time indicated by the meter by 3, the  painted  light  factor. Example: With the light meter, you have determined the exposure to be 6 seconds. Multiply the exposure time,   6   seconds,   by   the   painted   light   factor, 3 (6 x 3 = 18 seconds). The minimum exposure time required when using painted light is 10 seconds. An exposure of less than 10 seconds  does  not  give  the  photographer  enough  time  to illuminate  the  subject  evenly. PRODUCT   PHOTOGRAPHY TECHNIQUES Product photography requires patience and a keen eye.  The  slightest  change  in  lighting  or  subject placement can add to or subtract dramatically from your photograph. Pay particular attention to small details of your photograph because this helps to provide sharp, high-quality  images  with  fine  detail. 6-27







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