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Read this article in Introduction Imagine that you are inside a large Gothic cathedral, and the sunlight is streaming in from the windows on to a beautiful painting. You pull out your digital camera and take a photograph of the beautiful artwork on the church wall near one of the windows.
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You need not have bothered. Your digital photograph will be a flop. Either the painting will be dark and barely visible, or the window will appear as a glaring and dominant white area that is hardly recognizable as a window. The problem is not your camera. Free audio editor.
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The problem is that the dynamic range of the scene exceeds what the camera is able to capture. 
Since the birth of photography, photographers have attempted to increase the dynamic range that a photograph captures to recreate how our eyes see. A camera is able to capture a dynamic range of about 1:1,024 where the human eye is capable of seeing somewhere around 1:65,500. In the days of film, bridging this gap occurred in the darkroom. Today it occurs in the computer using a very nice program called HDR or High Dynamic Range.
Now, users searching the Mac App Store store for HDR apps are met with a wide range of options, both in price and features. I took a look at five apps to see how price, features, and results compared.
There is an abundance of information on the web regarding HDR photography, so I will only cover the basics here. The photographer will take several different exposures of the same scene encompassing the gamut of range in the exposures. You would have an exposure for the brightest area of the photograph and several exposures—at least 1 F-stop apart—bridging the gap until you have an exposure for the darkest area of the photograph. Windows for mac free software. The HDR program then takes this range and reduces it down to a usable, reproducible range.