Learn to use Lens Blur Filter.It's an advanced blur filter unlike any other. As compared to other blur filters (Blur, Blur More and Gaussian Blur) which blur images in its entirety, Lens Blur Filter provides more control on how one wish to blur the image. By referring to the selected Greyscale, it is able to know where to apply blur and how much to apply. We are able to achieve gradual blur using this method.