Thursday, 7 November 2013

Dynamic Range in the World of Photography

An informative article explaining Dynamic Range, what it is and how to handle it. It is written by Roger Passman, an award winning professional photographer located in Northern Illinois. He often leads creative photo workshops designed for beginning through intermediate amateur photographers, and it comes from our friends at Picture Correct.

Look at something other than your computer screen for a moment and take note of the world around you. You should notice bright highlights and dark shadow areas without much of a problem. Film and digital sensors do not see as well as you do. The shadows and highlights may be quantified as numbers that represent the luminance of any scene.

The standard measure of luminance is expressed as candelas per square meter or cd/m2. The luminance of the sun is expressed as a ratio of 1,000,000,000:1 or 1 billion candelas to 1 square meter. Other common expressions of luminance are:

Star light = 0.001:1
Moon light = 0.1:1
Indoor light = 50:1
Sunny sky = 100,000:1

So what does all this mean to me as a photographer?

To read the full description, follow this link:......Dynamic Range in the World of Photography – PictureCorrect

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