Robert with Roberts Productions demonstrates how to give your photos depth of field with Photoshop. You can create this effect by having a clear foreground and a gradually blurry background. First, duplicate the background layer. Then, go to filter and select Gaussian blur. Set it to a believable radius like 12 pixels. Create a mask by clicking on the mask icon. Then, make sure the foreground is set to black while the background is set to white. Next, go to the gradient tool and make sure that it is set to foreground to background. Then, click and drag on your photo on the spot where you would like to create the depth of field. Your depth of field will now be applied to your photograph.