The Wall Street Journal reports that Kodak, a company was synonymous with photography during a good part of its 131 years of existence – it had a 90 percent share of US photo-film sales in 1976 – is preparing for Chapter 11 bankruptcy if it can’t make survival cash by selling off its patent portfolio, itself a pathetic last act for the once-mighty company.
To measure the contrast ratio you will need a light meter. The process starts with you measuring the main source of light, or the key light.
Get a reading from the brightest area on the face of your subject. Then, measure the area lit by the secondary light, or fill light. To make sense of what you have just measured you have to understand that the information you have just gathered is in F-stops, a measure of light. With each additional F-stop, for example going one stop from f/1.4 to f/2.0, you create a doubling of light. The reverse is also true; moving one stop from f/8.0 to f/5.6 results in a halving of the light.
