Focus stacking is a technique where you layer a series of images, each with a different focus point, and blend them together using Photoshop. By identifying areas of each image that are in focus, Photoshop allows you to create an image that is completely sharp.
It can be particularly helpful when shooting macro subjects (such as Jewellery photography), when working at such close proximity and at such high magnification simply does not allow you to get adequate depth of field. You can apply focus stacking whether you’re photographing landscapes or macros, though I most commonly use it for product photography.
Learn how to focus stack here [FREE VIDEO & TUTORIAL]