Setting Blur Focal Distance

This control helps determine how the blur is applied. That is, pixels become blurrier the farther their brightness is from the distance value you set. Confused? Consider this example: If you set the Blur Focal Distance to a value of 128, pixels at that point (a middle gray) will be sharpest. Pixels that are black (with a value of 0) or white (with a value of 255) will be completely blurred. Amount of blurriness would decrease, then, as you move from 0 toward 128 or from 255 towards 128. This is a useful feature, but we're not going to use it right now, allowing our blurriness "gradient" to go straight from 0 (blurry) to 255 (unblurred).

4. Set the Radius slider in the Iris area of the dialog box to a value of 35. As with a real camera, the nature of the blur effect can depend on the characteristics of the "iris" (like the iris surrounding the pupil of your own eye). After you've been using Lens Blur for awhile, you can experiment with different shapes and blade curvature using the sliders in the Iris area of the dialog box. For now, we'll work only with the Radius slider, which, to oversimplify a bit, controls the amount of blurring applied.

5. You can make brighter pixels blur more strongly, which is what happens in real life. Slide the Brightness control in the Specular Highlights area to a value of 55. The Threshold slider adjusts how bright a pixel must be to be affected by this option. Leave it at 255 for now, but you can play with the slider to see how it affects the image, if you like.

Thisdocumentiscreatedwithtrial version ofCHM2PDF Pilot2.16.100. unrealistic. Set the Noise slider to a value of about 7 to replace some of the grain that the Lens Blur filter is removing. Choose the Gaussian option to randomize your noise, and mark the Monochromatic box to ensure that the noise will add grain only, and not change the colors of your image.

7. Click on OK to apply the Lens Blur effect. The final result is shown in Figure 2.55. It's a little exaggerated so the blurring will show up on the printed page, but you get the idea.

Figure 2.55. The finished effect looks like this.

Figure 2.55. The finished effect looks like this.

I love Photoshop CS's Lens Blur effect. It's much more flexible than the old way I showed you first, and can create some extraordinary looks.




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Understanding Adobe Photoshop Features You Will Use

Understanding Adobe Photoshop Features You Will Use

Adobe Photoshop can be a complex tool only because you can do so much with it, however for in this video series, we're going to keep it as simple as possible. In fact, in this video you'll see an overview of the few tools and Adobe Photoshop features we will use. When you see this video, you'll see how you can do so much with so few features, but you'll learn how to use them in depth in the future videos.

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