Figure 2.49. Everything is sharp in this digital camera shot.

To show how Lens Blur works, I created a Layer Mask and applied a black-white gradient to it. (I'm not going to explain how Layer Masks work here, as Lens Blur effect is the main point at the moment.) You can see the Layer Mask I created in Figure 2.50. When the Lens Blur is applied using that black (bottom) to white (top) gradient, the blurring shown in Figure 2.51 results. Everything at the bottom of the frame is sharp and gradually gets more blurry as you move towards the top of the frame.

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