It takes the more narrow depth of field from each photo in the series and combines them into a much wider depth of field, one that's usually wider than you could ever achieve in a single shot.
In other words, Photoshop doesn't just blend the images together it blends the depth of field from each image. In this tutorial, we'll learn how to do focus stacking in Photoshop! Focus stacking, or focus blending, means taking a series of images, each with a different part of your scene or subject in focus, and blending them together into a single image where your entire scene or subject is in focus.
