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Ulead PhotoImpact Tutorial
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Dyna-mite!

Dynamic Range is a popular photographic technique where the same subject is shot with different exposure levels to separately keep the best highlights, midtones, and shadows. The negatives of the lighter and darker shots are simultaneously developed to come up with a picture that has the fullest possible tonal range. Although very effective, this entire process could be both time-consuming and tedious when manually done.

However, you no longer have to worry about spending too much time and effort on this single task. Dynamic Range Extension, another addition to PhotoImpact's pool of new features, will do most of the work for you. Read on and find out how two versions of the same scene can be combined and edited to produce the best result.

To use Dynamic Range Extension, you need two shots on the same scene with different exposure levels. You can do this through a technique called "bracketing," a common photographic technique where you position the camera steadily (like using a tripod) and take several shots of the same subject using different camera settings (vary your exposure levels, aperture openings, and f-stop settings). Just make sure you have the exact same scene.

 

 
  1. For this tutorial, we already have some images for you to work on. We took two late evening shots of a skyline sunset using different exposure settings. Download the enclosed samples, pi8_01_sunset_lighter.jpg and pi8_01_sunset_darker.jpg to get you started. Open both images in PhotoImpact.
 
  1. Select Format: Dynamic Range Extension.
  1. In the Dynamic Range Extension dialog box, you'll see three (3) preview windows: one each for Darker Image, Lighter Image, and Result. Select the appropriate file name for the darker and the lighter image windows (pi8_01_sunset_darker.jpg should be in the darker image window, etc.). If you mistakenly interchange the two, PhotoImpact will correct this automatically. The composition result is shown on the 3rd window.
 

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