Exposure is the amount of light per unit area reaching the film or sensor. A well exposed film has all the tonal values it can capture. A well exposed digital image has a histogram spread across all the values. Exposure is what determines how the image is captured. This is a concise article on understanding exposure and the factors that determine it.
”Embrace light. Admire it. Love it. But above all, know light. Know it for all you are worth, and you will know the key to photography.” – George Eastman.
Getting an accurate measure of light was a tough task in the initial days of photography. Photographers tried various methods. When everything failed, the concept of ‘bracketing the shots for exposure’ was born. For getting that perfect exposure, it is important to understand how the light meters work.
(Captured at f/8)
When I had started writing, I had selected ‘f/8 and be there’ as the title for the site itself. This was for a very important reason. Since the time, hand-held cameras started appearing, photographers have been trying to get the sharpest image possible with good depth of field. They also try to capture the moment. Henri Cartier Bresson called it the ‘Decisive Moment’. Press photographers occasionally call it the ‘Story in a photograph’. Those who miss this call it the ‘Photo that got away’.