Camera and Image Dynamic Range
The dynamic range in photography refers to the luminosity range of a scene being photographed.
Therefore, the photographic medium used to record that scene can have their own dynamic range
limitations. Photographic films, digital sensors and photographic paper, they all have a light
sensitivity range which marks the difference between the darker shadow and the brightest highlight
for a particularly captured image. Even the computer's displays lack a good dynamic range.
Some digital sensors found in compact digital cameras or even in SLR-Like digital cameras, will not
be able to retain in a picture a favorable range of shadows and highlights. This is due to the small
sensors used and their average technology performance.
Taking pictures in a scene where opposite light intensities (deep black and bright white) will be
present, will always result in overexposed or underexposed images.
A digital SLR camera will handle much better this issue, being able to capture a larger dynamic
range due to its bigger sensor and improved technology.
However, the full dynamic range of a human-viewed scene still cannot be completely captured
in a single image. To overcome this camera handicap and produce images with a high dynamic
range, can be used the double or three exposure method (bracketing), then merging the resulting
files. There are also cameras explicitly designed to capture high dynamic range images